A hydrogen may pertain-to a female.Logical formLearned from17 sentences. Hydrogen may be considered.Logical formLearned from17 sentences. Hydrogen may undergo a liberation.Logical formLearned from17 sentences. A current can be constituted-of-or-filled-with hydrogen.Logical formLearned from17 sentences. A ball can be constituted-of-or-filled-with hydrogen.Logical formLearned from17 sentences. Gas can be a hydrogen.Logical formLearned from17 sentences. A source may pertain-to a hydrogen.Logical formLearned from17 sentences. Tritium can be a radioactive isotope of hydrogen.Logical formLearned from17 sentences. A demand can be for hydrogen.Logical formLearned from17 sentences. A transition can be to a (hydrogen economy).Logical formLearned from17 sentences. Hydrogen can be as an (energy carrier).Logical formLearned from17 sentences. Hydrogen may undergo a detection.Logical formLearned from17 sentences. Hydrogen can be mixed.Logical formLearned from17 sentences. Hydrogen can be a fuel of the future.Logical formLearned from16 sentences. A molecule can be constituted-of-or-filled-with hydrogen.Logical formLearned from16 sentences.