question: Which does the municipality have more households of, formal structures or informal structures?
#1 return the  municipality 
#2 return households of #1 
#3 return #2 that are formal structures 
#4 return #2 that are informal structures 
#5 return number of  #3 
#6 return number of  #4 
#7 return which is highest of #5 ,  #6