Input (grade 13): Butterflies are a natural monophyletic group, often given the sub-order Rhopalocera, which includes Papilionoidea (true butterflies), Hesperiidae (skippers), and Hedylidae (butterfly moths).
Output (grade 12): Butterflies are a natural monophyletic group. They are often placed in the suborder Rhopalocera, which includes Papilionoidea (true butterflies), Hesperiidae (skippers), and Hedylidae (butterfly moths).