user: Question: What was the weight of the jockey at Sandown Park? 
Columns: ['Result', 'Date', 'Race', 'Venue', 'Group', 'Distance', 'Weight', 'Jockey', 'Winner/2nd']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Won', '2 May 2011', 'Mooresbridge Stakes', 'Curragh', 'G3', '2000 m', '60', 'S. Heffernan', '2nd - Bob le Beau']
SQL:

assistant: SELECT "Weight" FROM "Table" WHERE "Venue" = 'Sandown Park';