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.
Example: Sentence: Jack played basketball after school, after which he was very tired.
Example solution: When did Jack play basketball?
Example explanation: This event likely happened between 3PM to 8PM (definitely not 2AM). Therefore, this question is correct.

Problem: Sentence: Horton has argued from this that he would be comfortable with a multiracial society, and that this distinguished him from his contemporaries.

Solution: When did Horton first publicly state his comfort with a multiracial society?