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_7 (company VARCHAR, principal_activities VARCHAR)
### Question:
What company focuses on Engine Overhaul for their principal activity?
### Answer:
SELECT company FROM table_name_7 WHERE principal_activities = "engine overhaul"