Categorize the following historical events.
- The moon landing
- The Iranian Revolution
- The Berlin Wall
- The moon landing: Space exploration
- The Iranian Revolution: Political revolution
- The Berlin Wall: Cold War event
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the following historical events.

### Input:
- The moon landing
- The Iranian Revolution
- The Berlin Wall

### Output:
- The moon landing: Space exploration
- The Iranian Revolution: Political revolution
- The Berlin Wall: Cold War event