A male may race for stairs.Logical formLearned from4 sentences. A weak charge may be placed on stairs.Logical formLearned from4 sentences. Students may rush_down stairs.Logical formLearned from4 sentences. Passengers may plunge through stairs.Logical formLearned from4 sentences. Stairs can be with an assistant.Logical formLearned from4 sentences. Stairs can be impassable.Logical formLearned from4 sentences. (Marble stairs) may lead_down a passageway to an altar.Logical formLearned from4 sentences. Students may rush_down a flight of stairs.Logical formLearned from3 sentences. Women may sit on (stone stairs).Logical formLearned from3 sentences. (Stone stairs) may knit.Logical formLearned from3 sentences. A man may come_down stairs.Logical formLearned from3 sentences. A US-president may fall_down stairs.Logical formLearned from3 sentences. Stairs may pertain-to a hotel.Logical formLearned from3 sentences. Stairs can be a part.Logical formLearned from3 sentences. A male may need help on stairs.Logical formLearned from3 sentences.