user: Question: What is the main service for the station with 14.849 million passengers 2011-12? 
Columns: ['Rank', 'Railway Station', 'Annual entry/exit (millions) 2011–12', 'Annual interchanges (millions) 2011–12', 'Total Passengers (millions) 2011–12', 'Location', 'Main Services', 'Number of Platforms']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'London Waterloo', '94.046', '9.489', '103.534', 'London', 'South Western Main Line West of England Main Line', 19.0]
SQL:

assistant: SELECT "Main Services" FROM "Table" WHERE "Total Passengers (millions) 2011–12" = '14.849';