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_name_50 (year_opened VARCHAR, location VARCHAR)
### Question:
Which year opened is located in west mifflin, pennsylvania?
### Answer:
SELECT year_opened FROM table_name_50 WHERE location = "west mifflin, pennsylvania"