CREATE TABLE table_5317 ("Player" TEXT, "Position" TEXT, "Date of Birth  ( Age ) " TEXT, "Caps" FLOAT, "Club/province" TEXT)

Which Player has a Position of number 8, and a Club/province of scarlets?
SELECT "Player" FROM table_5317 WHERE "Position" = 'number 8' AND "Club/province" = 'scarlets'
SELECT "Player" FROM "table_5317" WHERE "Club/province" = 'scarlets' AND "Position" = 'number 8'