(Gold mines) can be rich.Logical formLearned from19 sentences. A collapse may pertain-to a mine.Logical formLearned from19 sentences. A (gold mine) may undergo a development.Logical formLearned from19 sentences. A job can be at a mine.Logical formLearned from19 sentences. A head may pertain-to a (coal mine).Logical formLearned from19 sentences. Some others may be trapped in a mine.Logical formLearned from19 sentences. A collapse can be at a mine.Logical formLearned from19 sentences. A (methane explosion) may tear through a (coal mine).Logical formLearned from19 sentences. A mine can be makeshift.Logical formLearned from19 sentences. Some mines can be in a nation.Logical formLearned from19 sentences. A field can be constituted-of-or-filled-with (land mines).Logical formLearned from19 sentences. Some meters can be in a mine.Logical formLearned from19 sentences. Some miners may rescue from a mine.Logical formLearned from19 sentences. A mine can be in a (capital grozny).Logical formLearned from19 sentences. Some mines may be discovered.Logical formLearned from19 sentences.