Table: sat_launch_vehicle
Columns: flight
launch_date_time_utc
variant
launch_pad
payload
payload_mass

Question: Tell me the launch date/time for payload of gsat-4
SQL: SELECT "launch_date_time_utc" FROM sat_launch_vehicle WHERE "payload" = 'gsat-4'

Question: Tell me the launch pad for 25 december 2010 10:34
SQL: SELECT "launch_pad" FROM sat_launch_vehicle WHERE "launch_date_time_utc" = '25 december 2010 10:34'