Problems can be unanswered.Logical formLearned from15 sentences. Calls to offices may ring unanswered.Logical formLearned from15 sentences. Calls can be unanswered.Logical formLearned from15 sentences. A trail can be constituted-of-or-filled-with unanswered questions.Logical formLearned from15 sentences. A goal can be unanswered.Logical formLearned from14 sentences. Demands may go unanswered.Logical formLearned from14 sentences. A plea may go unanswered.Logical formLearned from14 sentences. A lot of questions may remain unanswered.Logical formLearned from14 sentences. A call to a home may go unanswered.Logical formLearned from14 sentences. A challenge can be unanswered.Logical formLearned from13 sentences. Mysteries can be unanswered.Logical formLearned from13 sentences. Answers can be to unanswered questions.Logical formLearned from13 sentences. An attack may go unanswered.Logical formLearned from13 sentences. An email may go unanswered.Logical formLearned from13 sentences. Comments can be unanswered.Logical formLearned from13 sentences.