Communications may undergo a failure.Logical formLearned from51 sentences. A problem can be with communication.Logical formLearned from51 sentences. Communication can be between management.Logical formLearned from51 sentences. (Mass flight delays) may be caused by a (communication failure).Logical formLearned from51 sentences. Communication can be among groups.Logical formLearned from51 sentences. A communication can be personalized.Logical formLearned from51 sentences. A communication can be based.Logical formLearned from51 sentences. Results may undergo a communication.Logical formLearned from51 sentences. Communications can be covert.Logical formLearned from51 sentences. Communications may be considered.Logical formLearned from51 sentences. A communication can be universal.Logical formLearned from51 sentences. A communication can be religious.Logical formLearned from51 sentences. Communications can be confidential.Logical formLearned from51 sentences. Communication can be with members.Logical formLearned from50 sentences. A communication can be convenient.Logical formLearned from50 sentences.