Problem: On what day in 1066 was William I crowned King of England in Westminster Abbey?
Answer: christmas day

Problem: Derived from the Greek for 'work', what is the CGS unit of energy?
Answer: erg

Problem: What famous horror film actor - especially for playing Dracula - died age 93 in 2015?
Answer: christopher lee

Problem: What is the largest island crossed by the Arctic Circle?
Answer:
greenland