Complex sentence: School-age children were hired as pinsetters until the installation of automatic pinsetting equipment in the 1950s; according to the Morongo Basin Historical Society, the bowling alley is one of the oldest in continuous use in California.
Split into simpler sentences: School-age children were hired as pinsetters until the installation of automatic pinsetting equipment in the 1950s. According to the Morongo Basin Historical Society, the bowling alley is one of the oldest in continuous use in California.