user: Question: What was the largest number of aggravated assaults when there were 3811 robberies? 
Columns: ['Year', 'Population', 'Index', 'Violent', 'Property', 'Murder', 'Forcible rape', 'Robbery', 'Aggravated assault', 'Burglary', 'Larceny Theft', 'Vehicle Theft']
Types: ['real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1960.0, 1768687.0, 34970.0, 1232.0, 33738.0, 43.0, 166.0, 563.0, 460.0, 7175.0, 24252.0, 2311.0]
SQL:

assistant: SELECT MAX("Aggravated assault") FROM "Table" WHERE "Robbery" = 3811.0;