user: Question: What is the sum of the yr plyf of coach Ed Robinson, who has a G plyf of 0?
Columns: ['Coach', 'First Yr', 'Last Yr', 'W-L%', 'G > .500', 'Yr plyf', 'G plyf', 'W plyf', 'L plyf']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Faye Abbott', 1928.0, 1929.0, 0.0, 13.0, 0.0, 0.0, 0.0, 0.0]
SQL:

assistant: SELECT SUM("Yr plyf") FROM "Table" WHERE "G plyf" = 0.0 AND "Coach" = 'Ed Robinson';