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 (primary_sponsor_s_ VARCHAR, owner_s_ VARCHAR, crew_chief VARCHAR)
### Question:
What primary sponsor has the owner Rick Hendrick and their crew chief is Alan Gustafson?
### Answer:
SELECT primary_sponsor_s_ FROM table_name_50 WHERE owner_s_ = "rick hendrick" AND crew_chief = "alan gustafson"