user: ### NOW ANSWER:
Question: What is the average heat that has 52.83 sb mark and lane less than 4?
Columns: ['Heat', 'Lane', 'Name', 'Country', 'Mark']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 5.0, 'Olesya Zykina', 'Russia', '51.75']
SQL:

assistant: SELECT AVG("Heat") FROM "Table" WHERE "Mark" = '52.83 sb' AND "Lane" < 4.0;