(Coal mines) can be unsafe.Logical formLearned from69 sentences. A mine can be closed.Logical formLearned from69 sentences. (Coal mines) can be in a country.Logical formLearned from69 sentences. A canary can be in a (coal mine).Logical formLearned from69 sentences. A portion may pertain-to a mine.Logical formLearned from69 sentences. A mine can be in state.Logical formLearned from69 sentences. (Diamond mines) can be lucrative.Logical formLearned from69 sentences. A (coal mine blast) may pertain-to a country.Logical formLearned from68 sentences. A mine can be owned.Logical formLearned from68 sentences. Canaries can be in a (coal mine).Logical formLearned from68 sentences. A vehicle may strike a (land mine).Logical formLearned from68 sentences. Interest can be in a mine.Logical formLearned from67 sentences. Areas may pertain-to a mine.Logical formLearned from67 sentences. A vehicle may strike a mine.Logical formLearned from67 sentences. A vehicle may run over a (land mine).Logical formLearned from67 sentences.