Stairs may undergo a railing.Logical formLearned from38 sentences. A male may climb_up stairs.Logical formLearned from38 sentences. A person may walk stairs.Logical formLearned from38 sentences. Persons may repair some (stair lifts).Logical formLearned from37 sentences. A (stair lift installation) may lift a team.Logical formLearned from37 sentences. A (stair lift installation) may pertain-to persons.Logical formLearned from37 sentences. Persons may provide (stair lifts).Logical formLearned from37 sentences. A cupboard can be under stairs.Logical formLearned from37 sentences. A female may ascend stairs.Logical formLearned from37 sentences. A stair may pertain-to a female.Logical formLearned from37 sentences. Persons may go_up stairs.Logical formLearned from37 sentences. Stairs can be narrow.Logical formLearned from36 sentences. A person can be on stairs.Logical formLearned from36 sentences. Sets can be constituted-of-or-filled-with stairs.Logical formLearned from36 sentences. A flight can be constituted-of-or-filled-with (stone stairs).Logical formLearned from36 sentences.