A female may fly_up stairs.Logical formLearned from6 sentences. Footsteps may descend stairs.Logical formLearned from6 sentences. A person may walk_up stairs to a room.Logical formLearned from6 sentences. A female may run for stairs.Logical formLearned from6 sentences. A remainder may pertain-to stairs.Logical formLearned from6 sentences. A male may trot_down stairs.Logical formLearned from6 sentences. Stairs may pertain-to a world-city.Logical formLearned from6 sentences. A person may stomp_down stairs.Logical formLearned from6 sentences. A male may come to a top of stairs.Logical formLearned from6 sentences. A male may thunder_down stairs.Logical formLearned from6 sentences. A male may climb_down stairs.Logical formLearned from6 sentences. Stairs can be to a basement.Logical formLearned from6 sentences. Persons may climb stairs to a room.Logical formLearned from6 sentences. Stairs can be dramatic.Logical formLearned from6 sentences. A female may follow_up a female stairs.Logical formLearned from6 sentences.