CREATE TABLE "2007_rugby_world_cup_squads" (
  "player" text,
  "position" text,
  "date_of_birth_age" text,
  "caps" real,
  "club_province" text
);

Question: When was Tomokazu Soma born who plays for the wild knights?
SQL: SELECT "date_of_birth_age" FROM "2007_rugby_world_cup_squads" WHERE "club_province"='wild knights' AND "player"='tomokazu soma';