user: Question: What C Class engine did Philipp Eng and team HS Technik Motorsport use?
Columns: ['Team', 'Driver', 'Class', 'Chassis', 'Engine', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['van Amersfoort Racing', 'Rahel Frey', 'C', 'Dallara F307', 'Volkswagen', '1–8']
SQL:

assistant: SELECT "Engine" FROM "Table" WHERE "Class" = 'C' AND "Team" = 'HS Technik Motorsport' AND "Driver" = 'Philipp Eng';