(Stair steps) can be for some climbs.Logical formLearned from2 sentences. Passengers may walk_down stairs.Logical formLearned from2 sentences. A person may hobble stairs.Logical formLearned from2 sentences. Students may scale an equivalent of some flights of stairs.Logical formLearned from2 sentences. A male may call_down stairs.Logical formLearned from2 sentences. A place can be under stairs.Logical formLearned from2 sentences. A daughter may clamber_up stairs.Logical formLearned from2 sentences. A floor can be to kicking stairs.Logical formLearned from2 sentences. Stairs may pertain-to a presidential helicopter.Logical formLearned from2 sentences. A hazard can be on stairs.Logical formLearned from2 sentences. (Spiral stairs) can be in a foyer.Logical formLearned from2 sentences. A flight can be constituted-of-or-filled-with (basement stairs).Logical formLearned from2 sentences. A gun may be kept unlock at a foot of stairs.Logical formLearned from2 sentences. A person may trudge_up some flights of stairs.Logical formLearned from2 sentences. Currencies may tumble_down a flight of stairs.Logical formLearned from2 sentences.