Footsteps may ascend stairs.Logical formLearned from2 sentences. A set can be constituted-of-or-filled-with (exit stairs).Logical formLearned from2 sentences. A seat can be on stairs.Logical formLearned from2 sentences. Someone may fall_down a flight of stairs.Logical formLearned from2 sentences. Dust can be on stairs.Logical formLearned from2 sentences. Stairs can be with a friend.Logical formLearned from2 sentences. A person may shout_down stairs.Logical formLearned from2 sentences. A person may get to a foot of stairs.Logical formLearned from2 sentences. Rails may pertain-to stairs.Logical formLearned from2 sentences. Stairs can be damp.Logical formLearned from2 sentences. Some stairs can be to a door.Logical formLearned from2 sentences. Landings can be on stairs.Logical formLearned from2 sentences. Mom may descend stairs.Logical formLearned from2 sentences. Persons may walk toward stairs.Logical formLearned from2 sentences. A female may use stairs.Logical formLearned from2 sentences.