A ph may pertain-to a country.Logical formLearned from17 sentences. Ph may be required.Logical formLearned from16 sentences. A ph may pertain-to persons.Logical formLearned from16 sentences. A ph can be low.Logical formLearned from16 sentences. (Soil ph) can be high.Logical formLearned from16 sentences. A ph may rise.Logical formLearned from16 sentences. A ph may be adjusted.Logical formLearned from15 sentences. A drop can be in ph.Logical formLearned from15 sentences. A ph can be high.Logical formLearned from15 sentences. A ph may pertain-to a product.Logical formLearned from15 sentences. A ph may be required.Logical formLearned from15 sentences. Ph can be in history.Logical formLearned from15 sentences. A doctor may receive a ph.Logical formLearned from15 sentences. Phs may buy.Logical formLearned from15 sentences. A ph may pertain-to a body.Logical formLearned from15 sentences.