SCHEMA:
CREATE TABLE table_29225103_2 (ep_winning_team VARCHAR, cp_winning_team VARCHAR, gm_winning_team VARCHAR)
USER:
Who was the EP winning team when the CP winning team was Dave Clark and the GM winning team was Stuart Northrup?

QUERY:
SELECT ep_winning_team FROM table_29225103_2 WHERE cp_winning_team = "Dave Clark" AND gm_winning_team = "Stuart Northrup"