CREATE TABLE "launch_history" (
  "flight" text,
  "launch_date_time_utc" text,
  "variant" text,
  "launch_pad" text,
  "payload" text,
  "payload_mass" text
);

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

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