CREATE TABLE table_29171931_3 (incoming_head_coach VARCHAR, outgoing_head_coach VARCHAR)

Who was the incoming head coach after Wan Jamak Wan Hassan quit the coaching job?
SELECT incoming_head_coach FROM table_29171931_3 WHERE outgoing_head_coach = "Wan Jamak Wan Hassan"
SELECT "incoming_head_coach" FROM "table_29171931_3" WHERE "Wan Jamak Wan Hassan" = "outgoing_head_coach"