A male may stop at a bottom of stairs.Logical formLearned from10 sentences. Stairs may lead to rooms.Logical formLearned from10 sentences. Stairs can be beautiful.Logical formLearned from10 sentences. A person may sit at a top of stairs.Logical formLearned from10 sentences. (Basement stairs) may pertain-to persons.Logical formLearned from10 sentences. A position can be on stairs.Logical formLearned from10 sentences. (Stair railings) may pertain-to a person.Logical formLearned from10 sentences. A female may be whispered at a top of stairs.Logical formLearned from10 sentences. A (stair lift) may be installed.Logical formLearned from10 sentences. Penguins may get to stairs.Logical formLearned from10 sentences. Persons may stumble_down stairs.Logical formLearned from10 sentences. A stair may pertain-to persons.Logical formLearned from10 sentences. A female may make a way to stairs.Logical formLearned from10 sentences. A person may climb a stair.Logical formLearned from10 sentences. Persons may reach a bottom of stairs.Logical formLearned from10 sentences.