user: Question: How many yardage figures for the player with 72.3 QB rating?
Columns: ['Name', 'Completions', 'Attempts', 'Completion %', 'Yards', 'Touchdowns', 'Interceptions', 'QB Rating']
Types: ['text', 'real', 'real', 'text', 'real', 'real', 'real', 'text']
Sample row: ['Ben Roethlisberger 1', 2359.0, 3739.0, '63.1%', 29710.0, 428.0, 108.0, '92.5']
SQL:

assistant: SELECT COUNT("Yards") FROM "Table" WHERE "QB Rating" = '72.3';