Construct a sentence with the words "enduring", "relationship", and "longevity".
The couple's enduring relationship is a testament to their commitment to longevity and happiness together.
Complete the following task based on the instruction and optional input provided.### Instruction:
Construct a sentence with the words "enduring", "relationship", and "longevity".

### Output:
The couple's enduring relationship is a testament to their commitment to longevity and happiness together.