How many credits is the course that the student with the last name Smithson took, and what is its description?
return students ;return last names of  #1 ;return #1 where  #2 is  Smithson ;return courses of  #3 ;return credits of  #4 ;return description of  #4 ;return #5 ,   #6
['select', 'project', 'comparative', 'project', 'project', 'project', 'union']