Identify which instrument is string or percussion: Rock gong, Yazheng
Yazheng is string, Rock gong is percussion.
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: Identify which instrument is string or percussion: Rock gong, Yazheng
### Input: 
### Response: Yazheng is string, Rock gong is percussion.