Table schema:
CREATE TABLE table_29225103_2 (hp_winning_team VARCHAR, ep_winning_team VARCHAR, gm_winning_team VARCHAR)

Question: Who was the HP winning team when the EP winning team was Hans Zereis and the GM winning team was Charles Gibson? 
SQL: SELECT hp_winning_team FROM table_29225103_2 WHERE ep_winning_team = "Hans Zereis" AND gm_winning_team = "Charles Gibson"