1) The Bank of England, established in 1694, is the central bank of the United Kingdom and one of the oldest central banks in the world.

2) The Russian Revolution in 1917 resulted in the overthrow of the monarchy and the establishment of a communist government under Vladimir Lenin.

3) The Great Rift Valley is a geological feature that stretches over 6,000 kilometers (3,700 miles) from Lebanon to Mozambique. It is known for its diverse landscapes, including deep lakes, volcanic mountains, and fertile valleys, and is considered a significant site for the study of Earth's tectonic activity.

4) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.