Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_20613292_1 (production_code VARCHAR, directed_by VARCHAR)
### Question:
How many different production codes does the episode directed by Dominic Polcino have?
### Answer:
SELECT COUNT(production_code) FROM table_20613292_1 WHERE directed_by = "Dominic Polcino"