question: List the name of the stadium where both the player 'Walter Samuel' and the player 'Thiago Motta' got injured.
#1 return stadiums 
#2 return players injured in #1 
#3 return #1 where  #2 is 'Walter Samuel 
#4 return #1 where  #2 is 'Thiago Motta 
#5 return #1 of  both #3 and #4 
#6 return name of  #5