user: Question: What is the total number of Yds/Att where Net Yds was 1818, and Rank was larger than 1?
Columns: ['Rank', 'Name', 'Attempts', 'Net Yds', 'Yds/Att', 'Year']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Tim Biakabutuka', 303.0, 1818.0, 6.0, 1995.0]
SQL:

assistant: SELECT SUM("Yds/Att") FROM "Table" WHERE "Net Yds" = 1818.0 AND "Rank" > 1.0;