Problem: Opened in 1921, In which US city is the Wrigley Building?
======
A: chicago

Problem: Which city is served by Dulles airport?
======
A: washington

Problem: In which US state were the 1692 Witch Trials held?
======
A: massachusetts

Problem: What can be a bandage company, a Doctor Who companion (the 7th Dr), and a hardware company?
======
A:
ace