Problem: What man-made waterway was constructed between 1859 and 1869?
Answer: suez canal

Problem: What is the common name of aluminium/aluminum oxide crystals used in grinding?
Answer: corundum

Problem: Which ship rescued most of the survivors of the 'Titanic'?
Answer: s s carpathia

Problem: Yellowstone National Park is in which US state?
Answer:
wyoming