A (power base) may pertain-to a world-city.Logical formLearned from16 sentences. A base may be attacked by some bombs.Logical formLearned from16 sentences. A (power base) can be ancestral.Logical formLearned from16 sentences. A country may maintain bases.Logical formLearned from16 sentences. A solid base can be constituted-of-or-filled-with customers.Logical formLearned from16 sentences. Information can be about a base.Logical formLearned from16 sentences. Bases may pertain-to a militia.Logical formLearned from16 sentences. Jets may return to base.Logical formLearned from16 sentences. A base can be in hills.Logical formLearned from16 sentences. A cut can be in bases.Logical formLearned from16 sentences. Leases can be for bases.Logical formLearned from16 sentences. Some bases can be in a state.Logical formLearned from16 sentences. An industrial base may undergo construction.Logical formLearned from15 sentences. A base can be for scientific research.Logical formLearned from15 sentences. A base can be for a group.Logical formLearned from15 sentences.