user: Question: What was the playoff apps for Thomas Heary, that had the position DF?
Columns: ['Squad No.', 'Name', 'Position', 'League Apps', 'League Goals', 'FA Cup Apps', 'FA Cup Goals', 'League Cup Apps', 'League Cup Goals', 'FLT Apps', 'FLT Goals', 'Playoff Apps', 'Playoff Goals', 'Total Apps', 'Total Goals']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'real', 'text', 'real', 'text', 'real', 'text', 'real', 'text', 'real']
Sample row: [2.0, 'Steve Jenkins', 'DF', '40', 1.0, '1', 0.0, '1', 0.0, '4', 0.0, '1', 0.0, '47', 1.0]
SQL:

assistant: SELECT "Playoff Apps" FROM "Table" WHERE "Position" = 'DF' AND "Name" = 'Thomas Heary';