Definition: In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
Input: Article: IWFU is short for "I want to find you", and is an-easy-use Internet program which makes communication online easy. With IWFU, you can chat, send messages, play games and surf the Internet with your friends, and much more. With just a click of your mouse, you and your friends are connected at once. Using IWFU is simple. When you install IWFU, the program asks you to register . When you register, you receive a special IWFU number. You can also enter information about yourself which allows other IWFU users to recognize you when you log on. Once you've registered, you can make a list of your IWFU friends. IWFU will then use the list to identify your friends. As soon as you log onto the Internet, IWFU will let people know that you are online. Whether you are in Asia or Europe, in the United States or China, you can access your friends from anywhere and at any time through IWFU. 
 Answer: an Internet program used for online communication
