An approach can be to a problem.Logical formLearned from1 326 sentences. A cause may pertain-to problems.Logical formLearned from1 316 sentences. Problems may pertain-to a continent.Logical formLearned from1 294 sentences. Problems can be challenging.Logical formLearned from1 287 sentences. Persons may have problems.Logical formLearned from1 280 sentences. A problem may get worse.Logical formLearned from1 257 sentences. (Health problems) can be chronic.Logical formLearned from1 246 sentences. Problems can be urgent.Logical formLearned from1 239 sentences. Problems may be resolved.Logical formLearned from1 222 sentences. Problems may arise.Logical formLearned from1 216 sentences. Problems can be urban.Logical formLearned from1 214 sentences. Persons may solve problems.Logical formLearned from1 200 sentences. Problems can be gastrointestinal.Logical formLearned from1 200 sentences. A problem can be simple.Logical formLearned from1 199 sentences. A country may have a problem.Logical formLearned from1 197 sentences.