user: Question: What is Jockey, when Winner is Alke?
Columns: ['Year', 'Winner', 'Jockey', 'Trainer', 'Owner', 'Time']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2007.0, 'Keyed Entry', 'John Velazquez', 'Anthony J. Sciametta, Jr.', 'Starlight Stable et al.', '1:15:72']
SQL:

assistant: SELECT "Jockey" FROM "Table" WHERE "Winner" = 'Alke';