Generate a sentence which describes the relationship between Elon Musk and SpaceX.
Elon Musk is the founder and CEO of SpaceX, a company focused on revolutionizing space technology and advancing the exploration and colonization of Mars.
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a sentence which describes the relationship between Elon Musk and SpaceX.

### Output:
Elon Musk is the founder and CEO of SpaceX, a company focused on revolutionizing space technology and advancing the exploration and colonization of Mars.