How many coaches does each club has? List the club id, name and the number of coaches.
return clubs ;return coaches  of  #1 ;return number of #2 for each #1 ;return club  ids of  #1 ;return names of  #1 ;return #4 ,   #5 , #3
['select', 'project', 'group', 'project', 'project', 'union']