(Foot steps) can be on stairs.Logical formLearned from4 sentences. Stairs may lead to a door.Logical formLearned from4 sentences. Stairs may pertain-to a servant.Logical formLearned from4 sentences. A female may use stairs.Logical formLearned from4 sentences. Stairs can be in a corner.Logical formLearned from4 sentences. (Stair lifts) can be used.Logical formLearned from4 sentences. A (stair lift) can be for a person.Logical formLearned from4 sentences. A female may run_up stairs to a bedroom.Logical formLearned from4 sentences. Thanks may be mumbled before run_upping stairs.Logical formLearned from4 sentences. A choice can be stairs.Logical formLearned from4 sentences. Stairs can be dim.Logical formLearned from4 sentences. A person can be in need of a (stair lift).Logical formLearned from4 sentences. A person may walk_up a set of stairs.Logical formLearned from4 sentences. A location can be under stairs.Logical formLearned from4 sentences. Stairs may look impossible.Logical formLearned from4 sentences.