Task: Question Decomposition
Input (English): question: When did the staff member with first name as Janessa and last name as Sawayn join the company?
Output (English): #1 return staff member 
#2 return first name  of  #1 
#3 return #1 where #2 is  Janessa 
#4 return last name  of  #1 
#5 return #1 where #4 is  Sawayn 
#6 return #1 in both #3 and  #5 
#7 return When #6 join company