What company focuses on Engine Overhaul for their principal activity?
CREATE TABLE table_name_7 (
    company VARCHAR,
    principal_activities VARCHAR
)
SELECT company FROM table_name_7 WHERE principal_activities = "engine overhaul"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What company focuses on Engine Overhaul for their principal activity? ### Input: CREATE TABLE table_name_7 (
    company VARCHAR,
    principal_activities VARCHAR
) ### Response: SELECT company FROM table_name_7 WHERE principal_activities = "engine overhaul"