instruction:
Based on the given context, craft a common-sense question, especially those that are LONG, INTERESTING, and COMPLEX. The goal is to write questions that are easy for humans and hard for AI machines! To create such questions, here are some suggestions: A. What may (or may not) be the plausible reason for an event? B. What may (or may not) happen before (or after, or during) an event? C. What may (or may not) be a plausible fact about someone (or something)? D. What may (or may not) happen if an event happens (or did not happen)? You can also create other types of questions. DO NOT make your question answerable without looking at the context, or question of which the correct answer can be directly extracted from the context. DO NOT ask a question that requires very specialized knowledge that is not common sense. DO NOT ask too simple or too short questions. Your question must be related to the context and answerable with common sense. Try to add more variations and complexity to the questions.
question:
Context: DENVER We d . August 27th - There were some tense moments at the Unconventional Denver convergence space Wednesday morning when police set up a perimeter around it and attempted to enter and search the building . Security at the space demanded a search warrant when police asked to enter the space . Legal aid was called to the scene immediately where video and written accounts were taken . Police were unable to obtain a warrant and left after some time , but not before arresting 2 activists outside the center .
answer:
What may be the reason the police left ?


question:
Context: He 's got a guy he loves and really wants to use , and has tried last week to set up an appointment with this guy to come out and see what needs to be done . Problem is - this guy wo n't return grandpa 's phone calls , and we were n't able to get him scheduled . I wanted that done before we moved on to other things , but by Friday , mom and I started thinking we could n't afford to wait anymore . Complication the third : House painting .
answer:
Why does the grandfather want to use the man in question ?


question:
Context: As a Navy clinical psychologist assigned to a Marine operational unit , I was authorized to wear their uniform . The corporal rolled forward in his wheelchair and shook my hand firmly . " You have no idea how great it is to see that uniform , ma'am , " he said with a grin .
answer:

Why did the corporal grin ?