Question: What is the name of this Victorian era theatrical partnership of a librettist and composer for which James Conroy-Ward is best known for performing its principal comic roles?
Sentence (from "Gilbert and Sullivan"): The two men collaborated on fourteen comic operas between 1871 and 1896, of which "H.M.S. Pinafore", "The Pirates of Penzance" and "The Mikado" are among the best known.
Relevant evidence: No