Question: What are the names of parties that have both delegates on "Appropriations"?
SQL: SELECT T2.Party FROM election AS T1 JOIN party AS T2 ON T1.Party   =   T2.Party_ID WHERE T1.Committee   =   "Appropriations" INTERSECT SELECT T2.Party FROM election AS T1 JOIN party AS T2 ON T1.Party   =   T2.Party_ID WHERE T1.Committee   =   "Economic Matters"