A boundary may pertain-to a county.Logical formLearned from40 sentences. A boundary can be unmarked.Logical formLearned from40 sentences. A boundary can be with a rest of a country.Logical formLearned from40 sentences. A boundary may be crossed.Logical formLearned from39 sentences. A river can be a boundary.Logical formLearned from39 sentences. A boundary can be well-defined.Logical formLearned from39 sentences. A boundary may pertain-to an estate.Logical formLearned from39 sentences. Boundaries can be ecological.Logical formLearned from39 sentences. Boundaries may be crossed.Logical formLearned from39 sentences. Boundaries can be curved.Logical formLearned from39 sentences. A boundary can be imaginary.Logical formLearned from38 sentences. Boundaries can be unclear.Logical formLearned from38 sentences. A course may pertain-to a boundary.Logical formLearned from38 sentences. Boundaries can be divisional.Logical formLearned from38 sentences. A boundary may pertain-to a province.Logical formLearned from38 sentences.