An adventure can be into an unknown.Logical formLearned from33 sentences. An unknown can be at a time.Logical formLearned from32 sentences. An unknown may undergo a search.Logical formLearned from31 sentences. An edge may pertain-to an unknown.Logical formLearned from31 sentences. A person can be an unknown.Logical formLearned from31 sentences. An unknown may manifest darkness.Logical formLearned from30 sentences. A group can be constituted-of-or-filled-with unknowns.Logical formLearned from30 sentences. A team can be constituted-of-or-filled-with unknowns.Logical formLearned from30 sentences. A mystery may pertain-to an unknown.Logical formLearned from29 sentences. A US-president can be an unknown.Logical formLearned from29 sentences. An unknown may undergo an exploration.Logical formLearned from28 sentences. An unknown may pertain-to a country.Logical formLearned from28 sentences. A venture can be into an unknown.Logical formLearned from26 sentences. An unknown may pertain-to a deity.Logical formLearned from26 sentences. An unknown can be on a stage.Logical formLearned from26 sentences.