Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What's the D ERP in San Martin Texmelucan, Puebla?

### Inputs:
table_name: table, columns: ['Callsign', 'Network', 'City of License', 'D ERP', 'Owner / Operator']

### Response:
SELECT D ERP FROM table WHERE City of License = san martin texmelucan, puebla