Complex sentence: The permanent museum is located in Hong Kong, and is organized by the Hong Kong Alliance in Support of Patriotic Democratic Movements in China, and it opened on 26 April 2014, shortly before the 25th anniversary of the incident.
Split into simpler sentences: The permanent museum is located in Hong Kong, and is organized by the Hong Kong Alliance in Support of Patriotic Democratic Movements in China. It opened on 26 April 2014, shortly before the 25th anniversary of the incident.