A river may form part of a southern border.Logical formLearned from16 sentences. A male may form with a brother.Logical formLearned from16 sentences. A male may form a project.Logical formLearned from16 sentences. A structure may form.Logical formLearned from16 sentences. A band may be formed in a month.Logical formLearned from16 sentences. Women may form groups.Logical formLearned from16 sentences. A (punk rock band) may be formed.Logical formLearned from16 sentences. A band may form in a world-city.Logical formLearned from16 sentences. Some lakes may be formed.Logical formLearned from16 sentences. Leagues may be formed.Logical formLearned from16 sentences. A lake may be formed by dam.Logical formLearned from16 sentences. Counties may be formed.Logical formLearned from16 sentences. An airline may be formed.Logical formLearned from16 sentences. Diamonds may be formed.Logical formLearned from16 sentences. A political party may form a government.Logical formLearned from16 sentences.