Persons may climb stairs.Logical formLearned from3 sentences. Persons may walk_up stairs to an apartment.Logical formLearned from3 sentences. A female may be called from a top of stairs.Logical formLearned from3 sentences. Stairs may pertain-to apartments.Logical formLearned from3 sentences. Stairs can be in a back.Logical formLearned from3 sentences. Stairs can be freakish.Logical formLearned from3 sentences. Stairs can be wobbly.Logical formLearned from3 sentences. A landing can be at a top of stairs.Logical formLearned from3 sentences. Stairs can be full.Logical formLearned from3 sentences. Stairs can be battered.Logical formLearned from3 sentences. A male can be to stairs.Logical formLearned from3 sentences. Friends may climb stairs.Logical formLearned from3 sentences. A person may come to some stairs.Logical formLearned from3 sentences. Stairs can be at a concert.Logical formLearned from3 sentences. A person may dash_up stairs.Logical formLearned from3 sentences.