user: Question: Rider of Stéphane Mertens had what lowest points?
Columns: ['Rank', 'Rider', 'Manufacturer', 'Points', 'Wins']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Doug Polen', 'Ducati', 432.0, 17.0]
SQL:

assistant: SELECT MIN("Points") FROM "Table" WHERE "Rider" = 'Stéphane Mertens';