A call may pertain-to an unknown.Logical formLearned from6 sentences. Hands may pertain-to an unknown.Logical formLearned from6 sentences. An unknown can be to persons.Logical formLearned from6 sentences. A parrot may solve equations with some unknowns.Logical formLearned from6 sentences. A weight may pertain-to an unknown.Logical formLearned from6 sentences. A midst may pertain-to an unknown.Logical formLearned from6 sentences. An unknown can be that something-is-the-case.Logical formLearned from6 sentences. Encounter can be with an unknown.Logical formLearned from6 sentences. An (unknown soldier) may be awarded.Logical formLearned from6 sentences. A (peace process) may plunge into an unknown.Logical formLearned from6 sentences. Persons may head into an unknown.Logical formLearned from6 sentences. An unknown can be a weather.Logical formLearned from6 sentences. An unknown can be before a vote.Logical formLearned from6 sentences. Behavior can be in namming an unknown.Logical formLearned from6 sentences. A person may have an unknown.Logical formLearned from6 sentences.