Complex sentence: ChinaSat 5B was launched in 1998, formerly known as Sinosat 1, was sold to Pasifik Satelit Nusantara in 2012.
Split into simpler sentences: ChinaSat 5B was launched in 1998, formerly known as Sinosat 1. It was sold to Pasifik Satelit Nusantara in 2012.