question: What are the personal name, family name, and author ID of the course author who teaches the most courses?
#1 return courses 
#2 return course authors of #1 
#3 return number of  #1 for each #2 
#4 return #2 where #3 is the  highest 
#5 return personal name  of #4 
#6 return family name  of #4 
#7 return author ID of #4 
#8 return #5 ,  #6 ,   #7