user: Question: What is the amount of Avg/G with a Name of blaine gabbert and a Long greater than 30?
Columns: ['Name', 'GP-GS', 'Gain', 'Loss', 'Long', 'Avg/G']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Derrick Washington', 14.0, 1078.0, 42.0, 59.0, 74.0]
SQL:

assistant: SELECT SUM("Avg/G") FROM "Table" WHERE "Name" = 'blaine gabbert' AND "Long" > 30.0;