CREATE TABLE election (Committee VARCHAR(255), Party VARCHAR(255)); CREATE TABLE party (Party_ID VARCHAR(255), Party VARCHAR(255))
Which committees have delegates from both democratic party and liberal party?
    
SQL: SELECT T1.Committee FROM election AS T1 JOIN party AS T2 ON T1.Party = T2.Party_ID WHERE T2.Party = "Democratic" INTERSECT SELECT T1.Committee FROM election AS T1 JOIN party AS T2 ON T1.Party = T2.Party_ID WHERE T2.Party = "Liberal"