user: Question: What is the total average for Rank entries where the Lane listed is smaller than 4 and the Nationality listed is San Marino?
Columns: ['Rank', 'Lane', 'Athlete', 'Nationality', 'Time', 'React']
Types: ['real', 'real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 6.0, 'Chris Brown', 'Bahamas', 44.79, 0.205]
SQL:

assistant: SELECT AVG("Rank") FROM "Table" WHERE "Lane" < 4.0 AND "Nationality" = 'San Marino';