Article: Pericarditis occurs when the pericardium (a membrane around the heart) is swollen or irritated, usually from viral infection. The resulting chest pain usually feels like a sharp, stabbing pain in either the center or the left side of your chest. In some patients, though, the pain is more of a dull pressure that spreads to the jaw and/or left arm. This pain can worsen with breathing or movement. Some of the symptoms of pericarditis look a lot like those of a heart attack:  Shortness of breath Heart palpitations Low-grade fever Fatigue or nausea Cough Swollen legs or abdomen Though pericarditis is often mild and resolves on its own, it's difficult to distinguish between its symptoms and those of a heart attack. It can also develop into more severe cases that can require surgery to relieve the symptoms. You need immediate supervision and diagnostic tests to find out what's actually causing the pain.  Call emergency services or ask someone to take you to the nearest emergency room. Just like with heart attacks, early treatment is the best way to prevent the condition from worsening. The pericardium has two layers of tissue that rub together when inflamed, causing the chest pain. By sitting in this position, you can reduce the tissue friction and its resulting pain while waiting for medical attention. Taking a non-steroidal anti-inflammatory drug like aspirin or ibuprofen will reduce the tissue inflammation. This, in turn, reduces the friction between the two layers of the pericardium and eases your chest pain.  Consult your doctor before taking these medications. With physician approval, take these medications three times a day with food. You should take a total of two to four grams of Aspirin per day or 1200 to 1800 mg of ibuprofen per day. Pericarditis is usually the result of a viral infection. You can treat it like the common cold to speed up your recover and eliminate the pain quickly. Rest and sleep will help your immune system function more efficiently, speeding up the healing process.
Question: What is a summary of what this article is about?
Learn the symptoms of pericarditis. Seek immediate medical attention. Ease the pain by sitting up and leaning forward. Take aspirin or ibuprofen. Get plenty of rest.

Problem: Article: This seems pretty easy, and it is. Still, a little politeness can go a long way, and your teacher will probably enjoy the interaction. This can work either in the classroom, or if you see your teacher somewhere else in the school, or even out in public. Make sure you are aware of time and place when you meet. If your teacher looks very busy, or in a hurry to get somewhere, don’t stop for a long conversation. A quick hello is all you will need. Anything more will just be annoying, and won’t help you. If you’re interested in the material, go ahead and talk to your teacher about it, or related topics that interest you. Your teacher wants to create enthusiasm for the subject, so anything you can do to show you are interested will make his day.  When you go talk to your teacher, make sure you have something in mind to discuss. Teachers are busy people, and won’t want to sit around if you have nothing to talk about. A specific question like “I still don’t understand this topic” can help keep you focused and give the teacher something to respond to. A non-specific or blanket statement like “I’m confused” doesn’t help either of you. You can also mention something interesting that is related to the class, maybe something else you’ve seen or read that seems familiar. For example, if your teacher was explaining a scientific principle, mention that you saw something similar in a movie, or the news, and ask if it is the same thing. It shouldn’t be big or special, just a way to suggest you appreciate their effort and like the way they are teaching. Just be careful not to do this too often, or it will look really obvious that you are trying to suck up.  The gift should be something small. Consider getting a gift card or even something you make yourself. A small handmade card or crafty item is more personal, and will help the teacher remember you. Something that reminds you of the lesson you just had can be good, as it tells the teacher you were paying attention. Avoid stuff like mugs or candles. Teachers will get lots of stuff like that, meaning your gift won’t stand out and be memorable. Remember to get gifts for holidays, especially Christmas. Other students will probably be getting your teacher a gift then too, so it won’t look too obvious that you are sucking up. Plus, you’ll definitely look better than those kids that didn’t get the teacher anything. This is a way to tell the teacher he is doing a good job, so if you are enjoying it, let him know. You want to make sure you have been paying attention to the class. If you haven't been, and the teacher has noticed, he won't take your compliment seriously. This doesn’t have to be a long conversation. As you leave, start by telling the teacher “I really liked it when we…” and mention something that you found interesting. Close by saying something like “That was fun” or “I really get that idea now,” which tells the teacher he did a good job.
Summary: Say hello to your teacher. Ask questions outside of class. Get the teacher a gift. Tell your teacher you like the class.

Whether you purchase a pre-assmebled cleaning kit from a sporting goods store or you assemble the necessary components individually, you'll need a few basic things to have in your arsenal of cleaning supplies. A basic set includes:  Cleaning solvent Lubricant, or gun oil A bore brush A patch holder and patches Cleaning rod A nylon cleaning brush Flashlight Cotton swabs Microfiber cloths for polishing . Always take the time to properly unload your gun and double-check to make sure that it's unloaded every time you pick it up to clean it. Remember that your gun may still have a round ready to fire after you remove the magazine, so check and remove this round. After opening the chamber, look through the barrel from back to front. Confirm that no round remains inside, either in the chamber or stuck in the barrel. No gun can be considered unloaded until you have looked through the barrel. Check the owner's manual for disassembly instructions to prepare the gun for cleaning. This will allow you to access all parts that become dirty from firing.  Semi-automatic pistols and rifles will generally be stripped into their major components: barrel, slide, guide rod, frame and magazine. Revolvers, shotguns, and most other sorts of guns will not need to be stripped to clean them. Field stripping is not necessary to clean the gun thoroughly. Don't take apart your gun more than you have to unless it requires repair. Likewise, some guns can't be stripped at all and it won't be necessary to do anything but open the chamber to clean it. Find a a place with good air circulation to clean your guns. Solvent fumes are noxious and can make you sick. Likewise, the solvent and lubricant used just flat-out smell foul if you try to clean your guns indoors, so keep your family happy and don't stink up the joint. Cover your work surface with plastic bags, newspaper, or old towels you've saved for the purpose. Head out to the garage and put the door up, or clean your guns on a bright and dry day to get them cleaned properly.
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One-sentence summary --
Get a cleaning kit. Unload your gun Disassemble your gun only as much as the manufacturer recommends. Always clean your gun in a well-ventilated area.