user: Question: What is Brian Mateer's Speed?
Columns: ['Rank', 'Rider', 'Team', 'Speed', 'Time']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Dan Sayle', '250cc Honda', '111.072mph', '1:01.08.66']
SQL:

assistant: SELECT "Speed" FROM "Table" WHERE "Rider" = 'Brian Mateer';