You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).

concept: Ben Stiller  answers:  ['Bernard']
who did ben stiller play in megamind?

concept: South America  answers:  ['Northern Hemisphere', 'Southern Hemisphere']
what hemisphere south america?

concept: American People Of The United States  answers:  ["Why Race Mattered in Barack Obama's Re-election"]

where did american troops fight in ww1?