A head may pertain-to a (demand curve).Logical formLearned from12 sentences. Curve can be by a female.Logical formLearned from12 sentences. Curves can be jagged.Logical formLearned from12 sentences. A curve can be odd.Logical formLearned from12 sentences. A person can be on a (learning curve).Logical formLearned from12 sentences. A combination can be constituted-of-or-filled-with curves.Logical formLearned from12 sentences. A (blackberry curve) can be red.Logical formLearned from12 sentences. Curves can be smooth.Logical formLearned from12 sentences. A (learning curve) can be huge.Logical formLearned from12 sentences. A (learning curve) can be flat.Logical formLearned from12 sentences. A (design curve) may pertain-to an industry.Logical formLearned from12 sentences. A curve can be jagged.Logical formLearned from12 sentences. A basic element can be a series of curves.Logical formLearned from12 sentences. A curve can be abrupt.Logical formLearned from12 sentences. A change can be in a curve.Logical formLearned from12 sentences.