"battle in World War I (1915); Germans wanted to try chlorine (a toxic yellow gas) as a weapon and succeeded in taking considerable territory from the Allied salient"@en-us . . . . "101300782"^^ . . "0"^^ . . "101229310"@en-us . . . . . . . . . . . "battle of Ypres"@en-us . . . . "0"^^ . . . . . . . "second battle of Ypres"@en-us . . . . "01300782-n"^^ . . . "battle in World War I (1915); Germans wanted to try chlorine (a toxic yellow gas) as a weapon and succeeded in taking considerable territory from the Allied salient"@en-us . . . "100850981"@en-us . "Ypres"^^ . . . "Ypres"@en-us .