Complex sentence: It is the longest-running film in the history of Indian cinema; as of early 2015, almost 20 years after its first release, it is still being shown at the Maratha Mandir theatre in Mumbai.
Split into simpler sentences: It is the longest-running film in the history of Indian cinema. As of early 2015, almost 20 years after its first release, it is still being shown at the Maratha Mandir theatre in Mumbai.