Question: Who was the HP winning team when the EP winning team was Hans Zereis and the GM winning team was Charles Gibson?
Schema: create table table_29225103_2 (hp_winning_team varchar, ep_winning_team varchar, gm_winning_team varchar, PRIMARY KEY (hp_winning_team))
SQL: select hp_winning_team from table_29225103_2 where ep_winning_team = "hans zereis" and gm_winning_team = "charles gibson"