Complex sentence: Luhrmann studied Zeffirelli's heavily cut script, and retained Shakespeare's language; however, he brought the setting up to date, making the Montagues and Capulets mobsters in a modern Miami-like city (although actually filmed in Mexico City and Veracruz).
Split into simpler sentences: Luhrmann studied Zeffirelli's heavily-cut script, and retained Shakespeare's language, however he brought the setting right up-to-date. The Montagues and Capulets are mobsters in a modern Miami-like city (although actually filmed in Mexico City and Veracruz).