question: Find the last name and gender of the students who are playing both Call of Destiny and Works of Widenius games.
#1 return students 
#2 return games of   #1 
#3 return #1 where #2 is Call of   Destiny 
#4 return #1 where #2 is Works of   Widenius 
#5 return #1 in  both #3 and  #4 
#6 return last names of   #5 
#7 return genders of   #5 
#8 return #6 ,  #7