Task: Question Decomposition
Input (English): question: Which parties have delegates in both the "Appropriations" committee and the "Economic Matters" committee?
Output (English): #1 return parties 
#2 return delegates of #1 
#3 return #2 in the Appropriations committee 
#4 return #2 in the Economic Matters committee 
#5 return #1 of both #3 and  #4