human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: 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
###Question: What is the main service for the station with 14.849 million passengers 2011-12? 
gpt
SELECT Main Services FROM table WHERE Total Passengers (millions) 2011–12 = 14.849