Polar bears can be pregnant.Logical formLearned from17 sentences. A (bear hunt) can be in some years.Logical formLearned from17 sentences. Polar bears can be adult.Logical formLearned from17 sentences. A bear may pertain-to a world-city.Logical formLearned from17 sentences. A (bear market) can be serious.Logical formLearned from16 sentences. (Bear attacks) can be rare.Logical formLearned from16 sentences. Problems can be with bears.Logical formLearned from16 sentences. Survival may pertain-to a bear.Logical formLearned from16 sentences. Bears can be common.Logical formLearned from16 sentences. Bears can be adult.Logical formLearned from16 sentences. Polar bears can be swimmers.Logical formLearned from16 sentences. A case may pertain-to a polar bear.Logical formLearned from16 sentences. A (bear collection) may pertain-to a male.Logical formLearned from16 sentences. A bear may break into a den.Logical formLearned from16 sentences. A male may kill a bear.Logical formLearned from16 sentences.