user: Question: How many games had a score value of 813.5 in post-season play?
Columns: ['Rank', 'Member Association', 'Points', 'Group stage', 'Play-off', 'AFC Cup']
Types: ['real', 'text', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Saudi Arabia', '860.5', 4.0, 0.0, 0.0]
SQL:

assistant: SELECT COUNT("Play-off") FROM "Table" WHERE "Points" = '813.5';