Task: Question Decomposition
Input (English): question: Which problems are reported by the staff with last name "Bosco"? Show the ids of the problems.
Output (English): #1 return problems  
#2 return staff who  reported #1 
#3 return last names of  #2 
#4 return #1 where #3 is  Bosco 
#5 return ids of  #4