user: ### NOW ANSWER:
Question: what is the number of people in Sri Lanka
Columns: ['S No', 'Opponent', 'Venue', 'Date', 'Match Performance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'England', 'Trent Bridge , Nottingham', '27 June 2004', '10-2-26-3; DNB']
SQL:

assistant: SELECT AVG("S No") FROM "Table" WHERE "Opponent" = 'Sri Lanka';