A male may run_up a flight of stairs.Logical formLearned from5 sentences. A person may step_up stairs.Logical formLearned from5 sentences. Stairs can be to the left.Logical formLearned from5 sentences. Stairs may be deserted.Logical formLearned from5 sentences. A person may walk a flight of stairs.Logical formLearned from5 sentences. (Exit stairs) may continue.Logical formLearned from5 sentences. A female may follow stairs.Logical formLearned from5 sentences. A female may face stairs.Logical formLearned from5 sentences. A door can be at a top of stairs.Logical formLearned from5 sentences. (Place stairs) may pertain-to a US-city.Logical formLearned from5 sentences. Footsteps may go_up stairs.Logical formLearned from5 sentences. A person may see on stairs.Logical formLearned from5 sentences. Stairs can be bright.Logical formLearned from5 sentences. A (stair lift) can be quality.Logical formLearned from5 sentences. Stairs can be invisible.Logical formLearned from5 sentences.