Stairs of a mansion may lead an eye.Logical formLearned from2 sentences. A writer may run_up some flights of stairs.Logical formLearned from2 sentences. Stairs may be filled with smoke.Logical formLearned from2 sentences. Persons may head_down endless stairs.Logical formLearned from2 sentences. Everybody may make for stairs.Logical formLearned from2 sentences. Stairs may lug (oxygen tanks).Logical formLearned from2 sentences. (Coiling stairs) can be endless.Logical formLearned from2 sentences. Workers may descend stairs.Logical formLearned from2 sentences. A male may escape by run_downing stairs.Logical formLearned from2 sentences. A set can be constituted-of-or-filled-with (subway stairs).Logical formLearned from2 sentences. Stairs can be to some rooms.Logical formLearned from2 sentences. A person may believe in a (stair climber).Logical formLearned from2 sentences. Gaps can be in stairs.Logical formLearned from2 sentences. A warning can be about a (stair removal).Logical formLearned from2 sentences. A male may remove some flights of stairs from a building.Logical formLearned from2 sentences.