Task: Question Generation
Input (English): #1 return papers 
#2 return #1 written before 2000 
#3 return #2 by H. V. Jagadish 
#4 return #3 by Divesh Srivastava 
#5 return number of  #4
Output (English): return me the number of papers written by " H. V. Jagadish " and " Divesh Srivastava " before 2000 .