user: Question: What is the Scoring rank when there are less than 21 events played with a rank of n/a in years less than 2011?
Columns: ['Year', 'Events played', 'Cuts made', 'Wins', '2nds', 'Top 10s', 'Best finish', 'Earnings ($)', 'Rank', 'Scoring average', 'Scoring rank']
Types: ['real', 'real', 'real', 'real', 'real', 'real', 'text', 'real', 'text', 'real', 'text']
Sample row: [2007.0, 1.0, 1.0, 0.0, 0.0, 0.0, 'T33', 14046.0, 'n/a', 75.0, 'n/a']
SQL:

assistant: SELECT "Scoring rank" FROM "Table" WHERE "Events played" < 21.0 AND "Rank" = 'n/a' AND "Year" < 2011.0;