A mystery may pertain-to a decline.Logical formLearned from6 sentences. Timing of attacks may remain a mystery.Logical formLearned from6 sentences. A mystery may stretch.Logical formLearned from6 sentences. A mystery may surround handling of (currency reserve).Logical formLearned from6 sentences. A disappearance may be shrouded in mystery.Logical formLearned from6 sentences. Connection can be with a mystery.Logical formLearned from6 sentences. A person can be in_the_face_of a mystery of pain.Logical formLearned from6 sentences. A man may be included in a mystery of a love.Logical formLearned from6 sentences. A cause of a blaze may remain a mystery.Logical formLearned from6 sentences. Details of a condition may remain a mystery.Logical formLearned from6 sentences. A cause of a blast may remain a mystery.Logical formLearned from6 sentences. Scientists may peer into mysteries of life.Logical formLearned from6 sentences. A mystery can be unexplored.Logical formLearned from6 sentences. A (mystery gas) may be released in a corridor.Logical formLearned from6 sentences. A mystery can be over trader.Logical formLearned from6 sentences.