Stairs may lead to vaults.Logical formLearned from3 sentences. Children may climb stairs.Logical formLearned from3 sentences. Stairs may undergo a building.Logical formLearned from3 sentences. Stairs can be on a (ground floor).Logical formLearned from3 sentences. Aff may wint_down stairs.Logical formLearned from3 sentences. A noise can be on stairs.Logical formLearned from3 sentences. A person can be at a foot of stairs.Logical formLearned from3 sentences. Steps may be heard on stairs.Logical formLearned from3 sentences. A female may run_up a flight of stairs.Logical formLearned from3 sentences. A door may pertain-to stairs.Logical formLearned from3 sentences. A wife can be at a top of stairs.Logical formLearned from3 sentences. Stairs may be provided.Logical formLearned from3 sentences. An exit can be a stair.Logical formLearned from3 sentences. A gate can be at a head of stairs.Logical formLearned from3 sentences. Difficulty can be with stairs.Logical formLearned from3 sentences.