A female can be at a foot of stairs.Logical formLearned from4 sentences. Stairs can be in a world-city.Logical formLearned from4 sentences. A talk can be on stairs.Logical formLearned from4 sentences. Persons may come_in from stairs.Logical formLearned from4 sentences. A person may reach a stair.Logical formLearned from4 sentences. A bump can be on a stair.Logical formLearned from4 sentences. Carpet can be on stairs.Logical formLearned from4 sentences. Steps may ascend stairs.Logical formLearned from4 sentences. A chill may pervade stairs.Logical formLearned from4 sentences. A male may run_down stairs.Logical formLearned from4 sentences. A person may take_up stairs.Logical formLearned from4 sentences. A female may show_up a male a pair of stairs.Logical formLearned from4 sentences. A female may reach a bottom of a stair.Logical formLearned from4 sentences. Stairs can be rotten.Logical formLearned from4 sentences. A party can be upon stairs.Logical formLearned from4 sentences.