You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.

They don't exist.\n\nThey exist and have a level of technology similar or less advanced then we have.\n\nThey exist and have a superior level of technology.\n\nIf they have our level or a lesser level of technology it is not likely that we would know about them. With our current ability to communicate long distances it would take thousands of years to get a signal from the nearest galaxy, or to travel those distances. \n\n\nIf the have a superior level of technology we would probably not be able to detect them. \n\nSo, it is possible given the size and scope of the universe, however, it would be damn hard to prove.
Do aliens exist? Are they on this planet right now?