A (hydrogen leak) can be in a (hydrogen vent line).Logical formLearned from4 sentences. A leak of gaseous hydrogen may occur.Logical formLearned from4 sentences. A hydrogen can be deadly.Logical formLearned from4 sentences. A hydrogen may undergo an abstraction.Logical formLearned from4 sentences. Accidents may lead to (hydrogen explosions).Logical formLearned from4 sentences. A hydrogen may undergo a substitution.Logical formLearned from4 sentences. Hydrogen can be in vehicles.Logical formLearned from4 sentences. A (hydrogen economy) can be mature.Logical formLearned from4 sentences. A location may pertain-to (hydrogen atoms).Logical formLearned from4 sentences. A core can be with some (hydrogen atoms).Logical formLearned from4 sentences. Traces can be constituted-of-or-filled-with (hydrogen cyanide).Logical formLearned from4 sentences. A (hydrogen selenide gas) can be toxic.Logical formLearned from4 sentences. A release can be constituted-of-or-filled-with hydrogen.Logical formLearned from4 sentences. A (hydrogen producer) may pertain-to a female.Logical formLearned from4 sentences. (Hydrogen sulfide) may occur.Logical formLearned from4 sentences.