A female may sit_down on a step of stairs.Logical formLearned from4 sentences. A female may proceed_up stairs.Logical formLearned from4 sentences. A female can be above stairs.Logical formLearned from4 sentences. Stairs may be installed.Logical formLearned from4 sentences. Stairs may be used.Logical formLearned from4 sentences. Requirements can be for stair.Logical formLearned from4 sentences. A male may clamber_up stairs.Logical formLearned from4 sentences. Stairs can be dangerous.Logical formLearned from4 sentences. Carpeting can be on stairs.Logical formLearned from4 sentences. Stairs can be rotted.Logical formLearned from4 sentences. Stairs may be draw_uped after a female.Logical formLearned from4 sentences. A (stair landing) can be unguarded.Logical formLearned from4 sentences. Difficulty can be in stairs.Logical formLearned from4 sentences. Posts may support (stair landings).Logical formLearned from4 sentences. Stairs may pertain-to buildings.Logical formLearned from4 sentences.