Who is the crew chief of team Chip Ganassi Racing with Felix Sabates, which has Casey Mears as the driver?
CREATE TABLE "teams_and_drivers" (
  "team" text,
  "car_s" text,
  "driver_s" text,
  "primary_sponsor_s" text,
  "crew_chief" text
);
SELECT "crew_chief" FROM "teams_and_drivers" WHERE "team"='chip ganassi racing with felix sabates' AND "driver_s"='casey mears';