Hydrogen can be flammable.Logical formLearned from26 sentences. A hydrogen may be used.Logical formLearned from25 sentences. A hydrogen can be hot.Logical formLearned from25 sentences. (Hydrogen gas) may undergo a production.Logical formLearned from25 sentences. Hydrogen can be from water.Logical formLearned from25 sentences. Hydrogen may be generated by cars.Logical formLearned from25 sentences. Researcher may trace an effect to a formation of (hydrogen peroxide).Logical formLearned from25 sentences. (Hydrogen fuel cells) may undergo a development.Logical formLearned from25 sentences. (Fuel cells) may run on hydrogen.Logical formLearned from25 sentences. Hydrogen can be for (fuel cells).Logical formLearned from25 sentences. A hydrogen can be in water.Logical formLearned from25 sentences. (Fuel cells) may use hydrogen.Logical formLearned from25 sentences. A reaction can be between hydrogen.Logical formLearned from25 sentences. (Hydrogen fuel cells) may undergo a use.Logical formLearned from24 sentences. A (hydrogen gas) can be ionized.Logical formLearned from24 sentences.