A male may fall_down stairs.Logical formLearned from132 sentences. Stairs can be dark.Logical formLearned from123 sentences. A person may go_up stairs.Logical formLearned from122 sentences. A male may run_up stairs.Logical formLearned from120 sentences. A person may come_up stairs.Logical formLearned from116 sentences. Stairs may pertain-to a house.Logical formLearned from115 sentences. Stairs can be carpeted.Logical formLearned from113 sentences. A male may walk_down stairs.Logical formLearned from109 sentences. A person may run_down stairs.Logical formLearned from108 sentences. A female may descend stairs.Logical formLearned from104 sentences. Stairs may lead.Logical formLearned from103 sentences. A male may take stairs.Logical formLearned from102 sentences. Flights can be constituted-of-or-filled-with stairs.Logical formLearned from101 sentences. Some set can be constituted-of-or-filled-with stairs.Logical formLearned from98 sentences. A female may run_up stairs.Logical formLearned from94 sentences.