Teacher:In this task, based on the given input, we ask you to write a question about when an event happened. Your question should be answerable with common knowledge on when events usually take place. For example, "going to school" usually happens during the day (not at 2 A.M). Don't create questions which have explicit mentions of answers in the text. Instead, it has to be implied from what is given. In other words, we want you to use "instinct" or "common sense". The written questions are not required to have a single correct answer.
Teacher: Now, understand the problem? Solve this instance: Sentence: After meeting Maharishi Mahesh Yogi , the Beatles quickly return to London , and in a press conference they say they made a mistake when they trusted Maharishi .
Student:
When did the Beetles hold their press conference?