What is the location of the station at Huntingdonshire with a station number of c17?
CREATE TABLE "stations" (
  "station_number" text,
  "district" text,
  "location" text,
  "type" text,
  "appliances" text,
  "registrations" text
);
SELECT "location" FROM "stations" WHERE "district"='huntingdonshire' AND "station_number"='c17';