1) The United States operates under a two-party system, with the Democratic Party and the Republican Party being the two major political parties that compete in elections and shape the country's political landscape.

2) The game of rugby originated at Rugby School in England and has since evolved into different versions, including Rugby Union and Rugby League.

3) The word "triangle" contains four vowels: I, A, E, and E.

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