SELECT T1.season FROM game AS T1 JOIN injury_accident AS T2 ON T1.id  =  T2.game_id WHERE T2.player  =  'Walter Samuel'
What is the season of the game which causes the player 'Walter Samuel' to get injured?
CREATE TABLE "stadium" (
"id" int,
"name" text,
"Home_Games" int,
"Average_Attendance" real,
"Total_Attendance" real,
"Capacity_Percentage" real,
primary key ("id")
);
CREATE TABLE "game" (
"stadium_id" int,
"id" int,
"Season" int,
"Date" text,
"Home_team" text,
"Away_team" text,
"Score" text,
"Competition" text,
primary key ("id"),
foreign key ("stadium_id") references `stadium`("id")
);
CREATE TABLE "injury_accident" (
"game_id" int,
"id" int,
"Player" text,
"Injury" text,
"Number_of_matches" text,
"Source" text,
primary key ("id"),
foreign key ("game_id") references `game`("id")
);
INSERT INTO  "stadium" VALUES (1,"Cowboys Stadium","8","87047","696377","108.8");
INSERT INTO  "game" VALUES (1,1,"2007","18 May 2007","Quruvchi","Pakhtakor","1–1","League");
INSERT INTO  "injury_accident" VALUES (1,1,"Davide Santon","Clean-up surgery on his right knee","12","inter.it");