Complex sentence: Its first art installation is a S $90,000 7-m-high Swarovski crystal chandelier at the Museum main entrance, which weighs 325 kilograms and took over three months to make.
Split into simpler sentences: Its first art installation was a S $90,000,-high Swarovski crystal chandelier at the museum main entrance. It weighs 325 kilograms and took over three months to make.