An identity of attackers may remain a mystery.Logical formLearned from12 sentences. A (mystery disease) may kill some persons.Logical formLearned from12 sentences. A mystery may remain intact.Logical formLearned from12 sentences. Mysteries may pertain-to a neighbor.Logical formLearned from11 sentences. A cause of a disaster may remain a mystery.Logical formLearned from11 sentences. Some (mystery film) may star a male.Logical formLearned from11 sentences. Mystery can be in space.Logical formLearned from11 sentences. A series can be constituted-of-or-filled-with some mysteries.Logical formLearned from11 sentences. A female can be an author of (mystery novels).Logical formLearned from11 sentences. A past may remain a mystery.Logical formLearned from11 sentences. A mystery can be in a country.Logical formLearned from11 sentences. A mystery can be in a book.Logical formLearned from11 sentences. An origin of a name can be a mystery.Logical formLearned from11 sentences. A mystery can be weird.Logical formLearned from11 sentences. Mysteries may pertain-to a story.Logical formLearned from11 sentences.