"firedamp"@en-us . . . . . . "0"^^ . "113885777"@en-us . "110559535"@en-us . . . . . "a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air"@en-us . . "firedamp"^^ . "14726998-n"^^ . . . . "0"^^ . "114726998"^^ .