A source may pertain-to a signal.Logical formLearned from115 sentences. Sources can be constituted-of-or-filled-with instability.Logical formLearned from115 sentences. An open source can be popular.Logical formLearned from115 sentences. Sources can be fresh.Logical formLearned from115 sentences. A source may pertain-to a language.Logical formLearned from115 sentences. Sources can be constituted-of-or-filled-with resistance.Logical formLearned from115 sentences. Sources can be constituted-of-or-filled-with nitrogen.Logical formLearned from115 sentences. A source can be alleged.Logical formLearned from115 sentences. A source can be undisclosed.Logical formLearned from115 sentences. Sources can be constituted-of-or-filled-with labor.Logical formLearned from114 sentences. A source can be plentiful.Logical formLearned from114 sentences. Sources may tell a newspaper.Logical formLearned from114 sentences. A source may pertain-to a tv-network.Logical formLearned from114 sentences. (Security sources) may confirm that something-is-the-case.Logical formLearned from114 sentences. Sources can be constituted-of-or-filled-with competitive advantage.Logical formLearned from114 sentences.