Task: Question Generation
Input (English): #1 return stations 
#2 return trains #1 serve 
#3 return #1 where #2 is  Ananthapuri Express  
#4 return #1 where #2 is  Guruvayur Express  
#5 return #1 of  both #3 and  #4 
#6 return names of  #5
Output (English): What are the names of the stations which serve both "Ananthapuri Express" and "Guruvayur Express" trains?