user: Question: What is the average number of million viewers that watched an episode before episode 11 with a share of 4?
Columns: ['Episode #', 'US air date', 'Rating', 'Share', 'Rating/Share (18–49)', 'Viewers (millions)']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Thursday, April 9, 2009', '6.5', '11', '2.6/8', 10.21]
SQL:

assistant: SELECT AVG("Viewers (millions)") FROM "Table" WHERE "Episode #" < 11.0 AND "Share" = '4';