Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Alan wanted to write a book. Sentence 2: He wrote one about science. Sentence 3: He found he really liked to write. Sentence 4: He wrote two more books. Sentence 5: They sold a lot of copies.

Books