Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.

concept: Vernon Davis  question:  what position does vernon davis play?
['Tight end']

concept: Philippines  question:  what type of government is the philippines?
['Republic']

concept: United States  question:  what type of government and economic system does the united states have?

Constitutional republic