You will be given a definition of a task first, then some input of the task.
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.

Article: "Make-A-Wish" is one of the world's most well-known charities . It makes wishes come true for childrenwho have serious illnesses. It gives them hope and joy and helps them forget about their health problems and have fun. It all started in 1980 in Phoenix, Arizona. Christopher was a 7-year-old boy who was very sick. He always dreamed ofbecoming a police officer. Tommy Austin and Ron Cox, two police officers, made his wish come true. They gaveChristopher a tour of the city in a police helicopter and made a real police uniform for him. There are four kinds of wishes children usually have: I wish to go. Children usually want to travel or go to a concert, a game or a park. I wish to meet. Children sometimes want to meet their favourite actors, singers or players. I wish to be. Some children wish to become actors, singers or police officers. I wish to have. They often want to have a computer, a game, a bike or many other things. Let'shope more wishes will come true in the future. People who work in the charity always try for the best. Almost25 ,000 Volunteers help, work or give money. Will you be one of them?
Answer: sick children
Output:
"Make-A-Wish" is a charity to help _ .