Task: Sentence Expansion
Input (English): This is an elastic band of tissue under the glans penis that connects to the prepuce , or foreskin to the vernal mucosa .
Output (English): The frenulum of prepuce of penis , often known simply as the frenulum , is an elastic band of tissue under the glans penis that connects the foreskin ( prepuce ) to the vernal mucosa , and helps contract the foreskin over the glans .