Diluted bitumen complicates Keystone pipeline cleanup
The oil spilled from TC Energy Corp's ruptured Keystone pipeline was diluted bitumen, the U.S. Environmental Protection Agency (EPA) said on Thursday, adding complications to the cleanup.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction: Diluted bitumen complicates Keystone pipeline cleanup

### Response: The oil spilled from TC Energy Corp's ruptured Keystone pipeline was diluted bitumen, the U.S. Environmental Protection Agency (EPA) said on Thursday, adding complications to the cleanup.