Complex sentence: Julio and Catalina Verdugo were officially granted title to the rancho by the Board of Land Commissioners in 1855, and in 1861 they split the rancho between southern and northern portions.
Split into simpler sentences: Julio and Catalina Verdugo were officially granted title to the rancho by the Board of Land Commissioners in 1855. In 1861 they split the rancho between southern and northern portions.