 Complete the following phrase:  In 1972, Muni began planning a long-proposed extension of the J Church line along San Jose Avenue a section of which was built along the former Ocean View Branch through the Bernal Cut to Balboa Park. The extension was intended to provide transit service to the Outer Mission, allow J Church and N Judah trains to access the carhouses via San Jose Avenue rather than a roundabout route via the K Ingleside line, and allow future through-routing of the J and M lines. Construction on the extension began in January 1989, but was delayed by 