A set can be constituted-of-or-filled-with some stairs.Logical formLearned from17 sentences. Stairs can be fixed.Logical formLearned from17 sentences. A person may fall_up stairs.Logical formLearned from17 sentences. A male may race_up stairs.Logical formLearned from17 sentences. Persons may have stairs.Logical formLearned from17 sentences. A female may walk stairs.Logical formLearned from17 sentences. Persons may run stairs.Logical formLearned from17 sentences. A person may reach stairs.Logical formLearned from17 sentences. A (hobby room) can be at a bottom of stairs.Logical formLearned from17 sentences. Stairs can be with a workbench.Logical formLearned from17 sentences. Stairs may lead from a house.Logical formLearned from17 sentences. Difficulty may climb stairs.Logical formLearned from17 sentences. Stairs can be bare.Logical formLearned from17 sentences. Stairs may be involved.Logical formLearned from17 sentences. A female may fall_down some stairs.Logical formLearned from16 sentences.