An extension can be barren.Logical formLearned from16 sentences. Cages can be barren.Logical formLearned from16 sentences. A sea can be barren.Logical formLearned from16 sentences. Dirt can be barren.Logical formLearned from16 sentences. Months can be barren.Logical formLearned from16 sentences. A (desert landscape) can be barren.Logical formLearned from16 sentences. Crags can be barren.Logical formLearned from16 sentences. A floor can be barren.Logical formLearned from16 sentences. A prairie can be barren.Logical formLearned from16 sentences. An outpost can be barren.Logical formLearned from16 sentences. Seasons can be barren.Logical formLearned from16 sentences. A (rock cluster) can be barren.Logical formLearned from16 sentences. A coastline can be barren.Logical formLearned from15 sentences. A decade can be barren.Logical formLearned from15 sentences. A concrete can be barren.Logical formLearned from15 sentences.