Teacher:In this task, we ask you to write an answer to a question about when an event happened. Your answer should be a wrong answer. That is, if you are asked about when an event happened, you should answer with a time that the event didn't likely happen. For example, "going to school" usually happens during the day (not at 2 A.M). Even though there exist multiple wrong answers, we only need a single wrong answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.
Teacher: Now, understand the problem? Solve this instance: Sentence: They practiced a slash-and-burn agriculture of yams and millet, a technique that exhausted the soil and imposed a semi-nomadic existence from one jungle clearing to another. 
Question: When do they plant yams and millet?
Student:
during the century.