Name two US Presidents that served in the 20th century.
Two US Presidents that served in the 20th century are Franklin D. Roosevelt (1933-1945) and Ronald Reagan (1981-1989).
Complete the following task based on the instruction and optional input provided.### Instruction:
Name two US Presidents that served in the 20th century.

### Output:
Two US Presidents that served in the 20th century are Franklin D. Roosevelt (1933-1945) and Ronald Reagan (1981-1989).