Complex sentence: On May 27,2013, Haijian 26 cruise group (including Haijian 26,46, and 66) entered the disputed waters around the Diaoyu Islands to expel fishing boats sailed by Japanese right-wing Ganbare Nippon activists.
Split into simpler sentences: On May 27,2013, Haijian 26 cruise group (including Haijian 26,46, and 66) entered the disputed waters around the Diaoyu Islands to expel fishing boats. These fishing boats were sailed by Japanese right-wing Ganbare Nippon activists.