A male may step_off a stair.Logical formLearned from3 sentences. Stairs can be constituted-of-or-filled-with heights.Logical formLearned from3 sentences. Stairs can be scary.Logical formLearned from3 sentences. A heap can be constituted-of-or-filled-with stairs.Logical formLearned from3 sentences. A cat can be on stairs.Logical formLearned from3 sentences. A bottom can be on stairs.Logical formLearned from3 sentences. A male may look at stairs.Logical formLearned from3 sentences. Stairs can be a killer.Logical formLearned from3 sentences. Stairs may lead_up to a church.Logical formLearned from3 sentences. A voice may drift_up stairs.Logical formLearned from3 sentences. A route can be to a top of stairs.Logical formLearned from3 sentences. A coat can be on stairs.Logical formLearned from3 sentences. A boy may descend stairs.Logical formLearned from3 sentences. Stairs can be in a lineup.Logical formLearned from3 sentences. A stair can be rickety.Logical formLearned from3 sentences.