A back may pertain-to a paper.Logical formLearned from289 sentences. A back may pertain-to a helmet.Logical formLearned from289 sentences. A back can be open.Logical formLearned from287 sentences. A back can be to a female.Logical formLearned from286 sentences. A person may have a back.Logical formLearned from284 sentences. A name can be on a back.Logical formLearned from283 sentences. Backs may pertain-to a male.Logical formLearned from281 sentences. A back may pertain-to a belt.Logical formLearned from277 sentences. Muscles can be in a back.Logical formLearned from275 sentences. A back may pertain-to a group.Logical formLearned from273 sentences. A back may pertain-to an arm.Logical formLearned from270 sentences. A back may pertain-to a spoon.Logical formLearned from270 sentences. A back may pertain-to a form.Logical formLearned from270 sentences. A back may pertain-to eyelids.Logical formLearned from269 sentences. A male may injure a back.Logical formLearned from269 sentences.