CREATE TABLE table_37218 ("Player" TEXT, "Position" TEXT, "Date of Birth  ( Age ) " TEXT, "Caps" FLOAT, "Club/province" TEXT)

What is the date of birth for the player from Ulster and plays at Centre position?
SELECT "Date of Birth (Age)" FROM table_37218 WHERE "Club/province" = 'ulster' AND "Position" = 'centre'
SELECT "Date of Birth (Age)" FROM "table_37218" WHERE "Club/province" = 'ulster' AND "Position" = 'centre'