Universal Studios:

On March 15, 1915,:8 Laemmle opened the world's largest motion picture production facility, Universal City Studios, on a 230-acre (0.9-km) converted farm just over the Cahuenga Pass from Hollywood. Studio management became the third facet of Universal's operations, with the studio incorporated as a distinct subsidiary organization. Unlike other movie moguls, Laemmle opened his studio to tourists. Universal became the largest studio in Hollywood, and remained so for a decade. However, it sought an audience mostly in small towns, producing mostly inexpensive melodramas, westerns and serials.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Who opened Universal City Studios on March 19, 1915?
unanswerable