Persons may have signals.Logical formLearned from62 sentences. Signals may undergo a propagation.Logical formLearned from62 sentences. Signals can be intermittent.Logical formLearned from62 sentences. Signals can be modulated.Logical formLearned from61 sentences. A signal can be to noise.Logical formLearned from61 sentences. A signal can be yellow.Logical formLearned from61 sentences. A country may give signals.Logical formLearned from61 sentences. Officials may give signals.Logical formLearned from61 sentences. A signal can be steady.Logical formLearned from60 sentences. (Television signals) can be analog.Logical formLearned from60 sentences. A strength may pertain-to signals.Logical formLearned from60 sentences. A (commuter train engineer) may run a (stop signal).Logical formLearned from60 sentences. Signals can be repeated.Logical formLearned from60 sentences. Signals may be crossed.Logical formLearned from60 sentences. Signals can be fresh.Logical formLearned from60 sentences.