user: Question: What is Country , when Rider is Lindsay Porter?
Columns: ['Place', 'Rider', 'Country', 'Machine', 'Speed', 'Time', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Chas Mortimer', 'United Kingdom', 'Yamaha', '87.49mph', '1:17.38.2', 15.0]
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Rider" = 'Lindsay Porter';