A signal may pertain-to a world-city.Logical formLearned from41 sentences. A signal can be constituted-of-or-filled-with interest.Logical formLearned from41 sentences. Signals may undergo a transduction.Logical formLearned from40 sentences. A signal may pertain-to a company.Logical formLearned from40 sentences. A direction may pertain-to a signal.Logical formLearned from40 sentences. A signal can be extracellular.Logical formLearned from40 sentences. Signals may undergo a processing.Logical formLearned from40 sentences. A signal can be processed.Logical formLearned from40 sentences. Signals can be from sensors.Logical formLearned from40 sentences. Some signals can be from sources.Logical formLearned from40 sentences. A (tv signal) may pertain-to a person.Logical formLearned from40 sentences. A signal can be hopeful.Logical formLearned from40 sentences. A signal can be solid.Logical formLearned from40 sentences. A signal may be generated.Logical formLearned from40 sentences. A signal can be alien.Logical formLearned from40 sentences.