user: Question: What is the highest rank of rider Colin Martin?
Columns: ['Rank', 'Rider', 'Team', 'Speed', 'Time']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Dan Kneen', '400cc Honda', '95.517mph', "46' 54.48"]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Rider" = 'Colin Martin';