user: What are some examples of headwear?

assistant: - Baseball cap
- Visor
- Skull cap
- Yamaka
- Beanie
- Cowboy hat
- Helmet
- Headband

user: What U.S. President has left the White House to be re-elected again?

assistant: Grover Cleveland. Mr. Cleveland served his first term from 1885 - 1889 and his second term was from 1893 - 1897.

user: Who invented the radio?

assistant: The radio was invented by Guglielmo Marconi, which allowed the harnessing of radio waves into a wireless communication system.  This invention did not happen in a vacuum.  It was enabled by investigating radio waves and understanding how to detect and transmit them.