A (police source) may speak on condition of anonymity.Logical formLearned from59 sentences. (Police sources) may speak on condition of anonymity.Logical formLearned from59 sentences. An (intelligence source) can be unnamed.Logical formLearned from59 sentences. A newspaper may cite sources.Logical formLearned from59 sentences. Sources may attend a meeting.Logical formLearned from58 sentences. A source may pertain-to an activity.Logical formLearned from58 sentences. Sources may undergo citations.Logical formLearned from58 sentences. A source can be portable.Logical formLearned from58 sentences. Sources can be constituted-of-or-filled-with (water supply).Logical formLearned from58 sentences. Some source can be constituted-of-or-filled-with uncertainty.Logical formLearned from58 sentences. Funding can be from some sources.Logical formLearned from58 sentences. A source can be close to a case.Logical formLearned from58 sentences. Sources can be competitive.Logical formLearned from58 sentences. Sources can be documented.Logical formLearned from58 sentences. Sources can be dutch.Logical formLearned from58 sentences.