List the name of the stadium where both the player 'Walter Samuel' and the player 'Thiago Motta' got injured.
select t2.name from game as t1 join stadium as t2 on t1.stadium_id = t2.id join injury_accident as t3 on t1.id = t3.game_id where t3.player = 'Walter Samuel' intersect select t2.name from game as t1 join stadium as t2 on t1.stadium_id = t2.id join injury_accident as t3 on t1.id = t3.game_id where t3.player = 'Thiago Motta'