. "0.5"^^ . . . "0"^^ . . . . . "a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system"@en-us . "nerve gas"@en-us . . . "114109977"@en-us . "14960721-n"^^ . . . . . . . "114960721"^^ . "nerve agent"@en-us . . . . "nerve gas"^^ . .