Task: Question Generation
Input (English): #1 return Korean immigrants did leave Chemulpo 
#2 return Korean immigrants did leave Veracruz 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return which is highest of #3 ,  #4
Output (English): Which port did the Korean immigrants leave later Chemulpo or Veracruz?