Concentrations of hydrogen may produce signals.Logical formLearned from12 sentences. A (hydrogen nuclei) can be in a sample.Logical formLearned from12 sentences. Scientists may deduce concentration of hydrogen.Logical formLearned from12 sentences. A (hydrogen atom) can be simple.Logical formLearned from12 sentences. Tritium can be a form of hydrogen.Logical formLearned from12 sentences. Nanostructures can be for (hydrogen production).Logical formLearned from12 sentences. Hydrogen can be likely.Logical formLearned from12 sentences. A pellet can be constituted-of-or-filled-with hydrogen.Logical formLearned from12 sentences. A (hydrogen section) may pertain-to a tank.Logical formLearned from12 sentences. Hydrogen can be in a core.Logical formLearned from12 sentences. A hydrogen can be affordable.Logical formLearned from12 sentences. A hydrogen can be constituent.Logical formLearned from12 sentences. A hydrogen can be homemade.Logical formLearned from12 sentences. A plot may involve hydrogen.Logical formLearned from12 sentences. A waste may contain (hydrogen sulfide).Logical formLearned from12 sentences.