In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: When a caterpillar feeds on a tomato leaf , the plant moves rapidly to meet with a defensive response , systematically releasing " proteinase inhibitors " -- proteins that interfere with the caterpillar's digestion -- throughout the plant , especially in the leaves . But how does the message get from the wounded leaf to the rest of the plant ? Most scientists believed the alarm was spread by chemical messengers until a team of researchers headed by David Weldon-- a biologist at the University of East Anglia in Norwich , England -- made a shocking discovery . An injured leaf , the researchers found , sends an electrical signal to warn neighboring leaves of upcoming danger . It's a " terribly tiny current " driven by an electrical potential difference of only 20 millvolts , says Weldon , who measured the voltage after electrodes were attached to the plant's surface . " Right now , all we can say is that there is a correlation , " Weldon notes . " If you wound the plant , you'll see an electrical signal accompanied by a biochemical response . " To learn more about the reaction , Weldon's team plans to insert electrodes within the pant tissue ( rather than on the surface ) to determine what's going on at the cellular level . The findings may help explain other mysteries surrounding plants . For example , many plants start to flower in springtime , as days grow longer , but plants sense the change in the day length through their leaves , while flowers begin to bloom at the buds . " There must be a signal from the leaf to the growing points , " Weldon says . " So far , no one has come up with a convincing chemical mechanism . Maybe an electrical signal is involved . "
Answer: They cure diseases by changing chemicals

A: What is the function of the " proteinase inhibitors " in tomato plants ?
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Q: Article: At the beginning of every year we promise ourselves we will live a healthier life, and exercise more. The year tarts with the best of intentions, but many times we are unable to keep up with very high goals. Good news is that a healthy lifestyle is achievable and it's all about making small changes that make a difference. News on healthy lifestyles says that the key is moderation and consistency. There are so many health and well-being products out there in the market promising many things. And although many may be true, select carefully. The basics of a healthy lifestyle is maintaining a balanced diet and doing regular exercise. By eating well, it means really to make sure you include plenty of vegetables and fruit preferably in season in your diet, avoid fried and junk foods and foods high in sugar as well as processed foods. Eating fresh homemade meals rather than ready-made meals which are high in salt and sugar is always the better option. Reducing alcohol intake, drinking plenty of water and supplementing your diet with healthy snacks like nuts and seeds. For external care choose natural skin care products and hair care oil. Natural beauty care involves using natural moisturizers like Argan oil, Coconut oil and Sweet Almond oil. These nourish the skin far more than counter creams full of chemicals. Skin reflects what we put inside of us, so a healthy diet with plenty of greens and healthy protein will make your skin brighter. Of course exercise is essential but the key is regular and consistent exercise. So walking three times a week for 45 minutes is much more beneficial than a binge workout once a week.
Answer: The reason isn't given in the passage.

A: Why can't we keep up with our goals according to the passage?
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Q: Article: Fake a book, leave a book. Public bookshelves are appearing across Germany on street corners, city squares and suburban supermarkets. In these free-for-all libraries, people can grab whatever they want to read, and leave behind anything they want for others. There's no need to register, no due date, and you can take or give as many as you want. "This project is aimed at everyone who likes to read regardless of age or education. It is open for everybody," Michael Aubermann, one of the organizers of the free book exchange in the city of Cologne, told The Associated Press. "We installed our other outdoor shelves last year and it's been working really well," said Aubermann, a 44-year-old who works in IT management. The public hook shelves, which are usually financed by donations and cared for by local \ volunteer groups, have appeared independently of each other in many cities across Germany including Berlin, Hannover and Bonn, and also in suburbs and villages. Each shelf holds around 200 books and it lakes about six weeks for a complete turnover, with all the old titles replaced by new ones, he said. While most of the shelves have so far been put up in upscale neighborhoods, Aubermann and the 20 volunteers who help look after the project are planning to put up future shelves in poor neighborhoods, where residents often don't have as much access to literature. So far, the Cologne book group has had few problems .Though a used-book seller once emptied every volume on a shelf to sell at a market. Another time the shelves were filled with material from a religious group. Even commercial book stores and online book retailers seem to support the idea of free book exchanges.
Answer: Public bookshelves spread across Germany.

A:
What's the text mainly about?
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