Input (grade 10): Popocatépetl is an active volcano and, at 5,426 m (17,802 ft), the second highest peak in Mexico after the Pico de Orizaba (5,636 m).
Output (grade 12): Popocatépetl (also called El Popo or Don Goyo) is an active volcano and the second highest mountain in Mexico after Pico de Orizaba (5,610 m).