Problem: What type of thing is the question "What 's the most common street name in America ?" asking about?
Answer: location

Problem: What type of thing is the question "What became the biggest cash crop in the U.S. in 1983 , surpassing corn ?" asking about?
Answer: entity

Problem: What type of thing is the question "What king boycotted Prince Charles 's wedding ?" asking about?
Answer:
human