user: Question: how many times is the transfer window, summer and the name sinclair?
Columns: ['Name', 'Country', 'Transfer window', 'Transfer fee', 'Apps', 'Goals']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Forde', 'IRL', 'Summer', 'Free', 7.0, 0.0]
SQL:

assistant: SELECT COUNT("Apps") FROM "Table" WHERE "Transfer window" = 'summer' AND "Name" = 'sinclair';