A problem can be a failure.Logical formLearned from315 sentences. Problems can be real.Logical formLearned from315 sentences. Problems can be numerical.Logical formLearned from313 sentences. A person may know a problem.Logical formLearned from312 sentences. An approach can be to (problem solvings).Logical formLearned from311 sentences. A problem can be theoretical.Logical formLearned from311 sentences. Persons can be a problem.Logical formLearned from311 sentences. A problem can be complicated.Logical formLearned from311 sentences. Response can be to a problem.Logical formLearned from311 sentences. An (immigration problem) can be illegal.Logical formLearned from310 sentences. (Computer problems) may pertain-to a person.Logical formLearned from310 sentences. A range can be constituted-of-or-filled-with (health problems).Logical formLearned from310 sentences. A person may see problems.Logical formLearned from309 sentences. Problems may face persons.Logical formLearned from308 sentences. Problems can be for persons.Logical formLearned from308 sentences.