Problem: Who was the first person to sail round northern Canada through the Bering Strait in 1906?
Answer: roald amundsen

Problem: Born Betty Joan Perske, which actress starred in The Big Sleep and To Have and Have Not?
Answer: lauren bacall

Problem: Which 2007 treaty amended the Maastricht Treaty and Treaty of Rome?
Answer: lisbon

Problem: In which decade was the hovercraft invented?
Answer:
1950s