user: Question: What company focuses on Engine Overhaul for their principal activity?
Columns: ['Company', 'Type', 'Principal activities', 'Incorporated in', "Group's Equity Shareholding"]
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Malaysia Airlines Cargo Sdn. Bhd', 'Subsidiary', 'Cargo', 'Malaysia', '100%']
SQL:

assistant: SELECT "Company" FROM "Table" WHERE "Principal activities" = 'Engine Overhaul';