Input question: A monopoly is where there is only one seller of a goods or service, what word is used for only one buyer?

Output answer: monopsony

Input question: "What actor starred in ""Batman"" and ""Birdman""?"

Output answer: michael keaton

Input question: Spelunking is the recreational pastime of exploring what?

Output answer: caves

Input question: Hedley Verity was an international star in which sport, during the 1930's?

Output answer:
cricket