user: Question: What is the average Weight of the person who is 6'9"?
Columns: ['Name', 'Pos.', 'Height', 'Weight', 'Year', 'Hometown (Previous school)']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Derick Nelson', 'F', '6\'5"', 226.0, 'Jr.', 'Lansing, MI ( Bridgton Academy )']
SQL:

assistant: SELECT AVG("Weight") FROM "Table" WHERE "Height" = '6''9"';