A man may pound on stairs.Logical formLearned from1 sentences. A stair can be to a story.Logical formLearned from1 sentences. A stair to a story may be mended.Logical formLearned from1 sentences. A (stair door) may be situated at a side of a living-room.Logical formLearned from1 sentences. A female may climb (basement stairs) with a heart.Logical formLearned from1 sentences. A female may trip_down stairs.Logical formLearned from1 sentences. A passage can be by stairs.Logical formLearned from1 sentences. An ace of spades may walk_up stairs.Logical formLearned from1 sentences. A male may gain stairs.Logical formLearned from1 sentences. A female may lead a wife to a foot of stairs.Logical formLearned from1 sentences. A gentleman may fall_down stairs.Logical formLearned from1 sentences. (Oak stairs) may creak.Logical formLearned from1 sentences. Someone can be on a stair.Logical formLearned from1 sentences. Persons may hear a step on a stair.Logical formLearned from1 sentences. A room may be lost in stairs.Logical formLearned from1 sentences.