An end can be constituted-of-or-filled-with problems.Logical formLearned from129 sentences. A us-state may have a problem.Logical formLearned from129 sentences. A problem can be np-hard.Logical formLearned from129 sentences. A problem may be eliminated.Logical formLearned from129 sentences. Problems can be unprecedented.Logical formLearned from129 sentences. Symptoms may pertain-to a problem.Logical formLearned from128 sentences. A problem can be tactical.Logical formLearned from128 sentences. A problem can be a difficulty.Logical formLearned from128 sentences. Persons may approach a problem.Logical formLearned from128 sentences. A problem can be unforeseen.Logical formLearned from128 sentences. A problem can be distressing.Logical formLearned from128 sentences. A (drinking problem) can be serious.Logical formLearned from128 sentences. A picture may show a problem.Logical formLearned from128 sentences. Technical problems can be complex.Logical formLearned from128 sentences. Problems may get worse.Logical formLearned from128 sentences.