Complex sentence: In February 2016 the building on which the Machine mural was painted changed ownership and became endangered sparking a community response to save it at a time when new developments were threatened sites throughout the city noted for its artistic personality.
Split into simpler sentences: In February 2016 the building on which the Machine mural was painted changed ownership and the mural became endangered. This sparked a community response to save the mural at a time when new developments were threatening sites throughout a city noted for its artistic personality.