Art Garfunkel initially declined to sing one of Simon & Garfunkel's biggest hits solo. Which song is it?
"Bridge Over Troubled Water"
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Art Garfunkel initially declined to sing one of Simon & Garfunkel's biggest hits solo. Which song is it?
### Input: 
### Response: "Bridge Over Troubled Water"