In this task, based on a given sentence, we ask you to write a question that involves the ordering of events, i.e., the understanding of how events are usually ordered. For example, "earning money" usually appears before "spending money". 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". Note that 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: What did Jack do after the game?
Example explanation: A plausible answer to this question is "he rested" which uses the understanding of ordering of events (When people "get tired", they usually "rest".) Hence, this is an event "ordering" question.

Problem: Sentence: Human operators are there to monitor the systems, catch errors and fine-tune the production process for maximum efficiency.

Solution: What do the human operators do when they leave work?