A mother may fall_down a flight of stairs.Logical formLearned from2 sentences. A sequence of stairs may be copied in scale.Logical formLearned from2 sentences. A room can be at a foot of stairs.Logical formLearned from2 sentences. A closet can be at a foot of stairs.Logical formLearned from2 sentences. A second floor may be reached by a flight of stairs.Logical formLearned from2 sentences. A friend may sleep_up stairs.Logical formLearned from2 sentences. A person may descend a set of stairs.Logical formLearned from2 sentences. (Stair carpet) may be removed.Logical formLearned from2 sentences. A (circulation stair) can be open.Logical formLearned from2 sentences. A (circulation stair) may encourage interaction.Logical formLearned from2 sentences. A (stair tower) may undergo construction.Logical formLearned from2 sentences. A porch can be with stairs.Logical formLearned from2 sentences. (Cellar stairs) may pertain-to a male.Logical formLearned from2 sentences. A person may resort to taking stairs.Logical formLearned from2 sentences. A person may rush_up stairs to a room.Logical formLearned from2 sentences.