Someone may come_up stairs.Logical formLearned from11 sentences. (Stair risers) may be ornamented with gold.Logical formLearned from11 sentences. A person may opt for stairs.Logical formLearned from11 sentences. A (stair system) may wrap_around an outside of towers.Logical formLearned from11 sentences. A female may tumble_down stairs.Logical formLearned from11 sentences. Stairs can be crooked.Logical formLearned from11 sentences. A male may head_down stairs.Logical formLearned from11 sentences. Stairs may undergo climbings.Logical formLearned from11 sentences. Stairs can be adjacent.Logical formLearned from11 sentences. Stairs can be uneven.Logical formLearned from11 sentences. Stairs can be enough.Logical formLearned from11 sentences. Visitors may climb (metal stairs).Logical formLearned from11 sentences. (Metal stairs) may be inclosed by wire.Logical formLearned from11 sentences. A person may rush_down stairs.Logical formLearned from11 sentences. A female may climb stairs to an apartment.Logical formLearned from11 sentences.