Article: Rare items such as party hats, Halloween masks and Santa hats have appeal because they are only available in a finite quantity. These items disappear every day as more players lose them and retire from playing. New items are good for short-term trades because finding a true price on the Grand Exchange (GE) takes a while. Also, merchants can easily sell new items at a premium to players who want to have the latest thing. If merchants are working together to drive up the price of an item, don't buy in unless the items has skilling value or value as a weapon or armor. Only trade speculative items for the short term, because many people will jump in and drive up profits, but the price fall when everyone sells will be precipitous.
Question: What is a summary of what this article is about?
Choose rare items. Buy new items. Merchant speculative items.

Problem: Article: Some cruise lines offer both movie as well as broadway show theatres, with offerings that you are sure to enjoy. Look into these in advance, so you know what the theater will be playing. There is a chance you may not be admitted without an adult, so be prepared.
Summary: Check out the theatre, if your cruise ship has one.

INPUT ARTICLE: Article: You will need a light source and a spectrophotometer. These are available in science lab supply stores. The spectrophotometer will have instructions for the proper usage of the model you bought. This equipment is inexpensive and easy to use, so this is one of the more common methods for measuring bacterial growth. In layman’s terms, turbidity is how cloudy your sample is. You should get a turbidity reading, which is measured in NTU (Nephelometric Turbidity Units). Your spectrophotometer may take some calibration before you can accurately measure the turbidity of your sample, so consult the manufacturer's reference manual prior to use. Turbidity corresponds to the amount of bacteria in the sample. The spectrophotometer will also tell you the percent transmission (%T). This number will be higher if the turbidity is lower. Compare your numbers from different tests to measure bacterial growth.

SUMMARY: Get the necessary equipment. Shine the light through the sample. Make some notes.

In one sentence, describe what the following article is about: It’s incredibly important to stay hydrated while exercising. This is particularly true if you work out outdoors, especially in the hot summer months. Water is the best way to keep hydrated. You could consider sports drinks as well, but pay attention to the ingredients: many are full of sugar and sodium. You won’t see much improvement from your exercise if you are constantly eating junk food. Eat a diet high in protein and “good” fats, such as fish, nuts, and dairy products. Avoid salty foods like potato chips, sugary snacks such as candy, and processed foods. It’s important to do your research and find out what ingredients are in your supplements, and if they will truly benefit you. Look for products with carbohydrates, minerals, vitamins, and essential amino acids. Be wary of products that sound too good to be true: they probably are.
Summary: Drink water. Eat healthy. Consider supplements.

Think about your current state of mind and life circumstances and ask yourself if your romantic feelings might be caused by these factors. Sometimes life events can cause people to seek comfort, stability, excitement, or validation from other people in our lives who they don't genuinely want to be with. Avoid pursuing a relationship with your best friend if you might be using them to feel better. For instance, you may seek comfort and distraction in a romance with your best friend after a death in the family. Take things slowly in your new relationship so that you can both figure out your feelings without distractions. Romantic touching and sexual contact can blur the lines of a relationship and confuse boundaries. Try to let your physical relationship evolve naturally out of genuine chemistry and affection. Acting on physical urges too soon may make the situation awkward or increase the intensity of your relationship very quickly. Moving slowly is a good way of avoiding confusing hot-and-cold behaviour. Making a grand romantic move one week, then acting like a casual buddy the next will leave your friend unsure of your feelings. Take things slow and gradually build up to bigger gestures or commitments so you won't be overwhelmed by the situation. For instance, don't show up to your friend's workplace with flowers one day and introduce them to colleagues as your "buddy" a few days later. Taking things to the next level with your best friend can reinforce an already strong bond, making it tempting to spend all of your time with them. Take some time apart to pursue your own interests and to make sure that you get the chance to miss each other. This will make you appreciate each other even more while reducing the risk of becoming annoying to each other. For example, take time to visit with other friends or spend some quiet time alone at home.
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One-sentence summary --
Make sure that your motivations are pure and not temporary. Avoid getting physically intimate until you are sure of your chemistry. Be consistent about your romantic advances to avoid confusion. Give each other space sometimes to avoid getting tired of each other.