A person may fall_down a flight of stairs.Logical formLearned from56 sentences. A male may fall_down a flight of stairs.Logical formLearned from56 sentences. A male may go_up stairs.Logical formLearned from56 sentences. Stairs may undergo a landing.Logical formLearned from56 sentences. Stairs can be narrow.Logical formLearned from56 sentences. A male may come_up stairs.Logical formLearned from55 sentences. A stair may pertain-to a person.Logical formLearned from55 sentences. A top may pertain-to a stair.Logical formLearned from54 sentences. Stairs can be circular.Logical formLearned from54 sentences. An end may pertain-to stairs.Logical formLearned from53 sentences. A male may head for stairs.Logical formLearned from51 sentences. A cupboard can be under stairs.Logical formLearned from50 sentences. A middle may pertain-to stairs.Logical formLearned from50 sentences. Persons may take stairs.Logical formLearned from50 sentences. A female may fall_down a flight of stairs.Logical formLearned from50 sentences.