A defense may pertain-to borders.Logical formLearned from51 sentences. Troops may guard a border.Logical formLearned from51 sentences. A (border city) may pertain-to a us-state.Logical formLearned from51 sentences. A need can be for (border security).Logical formLearned from51 sentences. A (state border) may pertain-to a US-city.Logical formLearned from51 sentences. A border can be to the south.Logical formLearned from51 sentences. A temblor can be close to a border.Logical formLearned from51 sentences. Borders can be southeastern.Logical formLearned from51 sentences. Talks can be on borders.Logical formLearned from51 sentences. Waters can be around a border.Logical formLearned from51 sentences. (Border crossings) may undergo reopenings.Logical formLearned from51 sentences. A country may mass some troops on a border.Logical formLearned from51 sentences. A war can be over a border.Logical formLearned from51 sentences. Some (border guards) may be killed.Logical formLearned from51 sentences. A border can be unfenced.Logical formLearned from51 sentences.