user: Question: Name the entrant for 1975 and chassis of Hill GH1
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1972.0, 'Darnvall Connew', 'Connew PC1', 'Cosworth V8', 0.0]
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Year" = 1975.0 AND "Chassis" = 'Hill GH1';