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

### Instruction:
How many cellos are suggested in the reference with section size for 20 players?

### Inputs:
table_name: table, columns: ['Reference', 'Author', 'Section Size', 'Violins', 'Violas', 'Celli', 'Basses']

### Response:
SELECT Celli FROM table WHERE Section Size = 20 players