Complex sentence: Frankston is the sister city of Susono, Shizuoka in Japan and Frankston High School maintains a strong sister school relationship with Kawaguchi-Kita High School in the Greater Tokyo Area which began in 1988.
Split into simpler sentences: Frankston is the sister city of Susono, Shizuoka in Japan. The school maintains a strong sister school relationship with Kawaguchi-Kita High School in the Greater Tokyo Area, which began in 1988.