Which T.C. has a Year larger than 2007, and a D.C. of 21st?
CREATE TABLE "gp2_series" (
  "year" real,
  "drivers" text,
  "races" real,
  "wins" real,
  "poles" real,
  "f_l" real,
  "points" real,
  "d_c" text,
  "t_c" text
);
SELECT "t_c" FROM "gp2_series" WHERE "year">2007 AND "d_c"='21st';