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.

[Q]: Context: I ran out into the hallway , and joined a crowd going down the stairs . At the third floor , someone at the front of the crowd started saying we could n't get out . I shouted that we should at least go down and try : it 's better than standing in the stairwell . At the second floor , a woman was holding the stairwell door open , gesturing for us to follow . The student lounge was jam - packed , the wide - screen tv was turned on to CNN .
[A]: Why were these students locked in ?


[Q]: Context: not a big change . they 're actually really similar - thick black frames with pink on the inside . but they fit my face a lot better , making me appear thinner . i really like them .
[A]: What may happen after this situation ?


[Q]: Context: A Proclamation by the President of the United States of America September 11 , 2001 , was etched into America 's memory when 19 terrorists attacked us with barbarity unequaled in our history . On Patriot Day , we cherish the memory of the thousands of innocent victims lost , extend our thoughts and prayers to their families , and honor the heroic men and women who risked and sacrificed their lives so others might survive . Since 9/11 , we have recognized the threat posed by terrorists to the safety of the American people and worked to protect our homeland by fighting terrorists abroad . We are confronting terrorism by advancing freedom , liberty , and prosperity as an alternative to the ideologies of hatred and repression .
[A]:
Why did terrorists attack ?