Show me the name of players that got injured?
select player from injury_accident
Give me the id of the games where Walter Samuel and Thiago Motta got injured.
select game_id from injury_accident where player = 'Walter Samuel' or player = 'Thiago Motta'
What about the name of the stadium where both of them 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'