Complex sentence: There are three government-run television networks, which are the People's Television Network (PTV-4), the Intercontinental Broadcasting Corporation (IBC-13) and the Philippine Broadcasting Service (PBS) constitute the government radio network.
Split into simpler sentences: There are three government-run television networks, which are the People's Television Network (PTV-4), the Intercontinental Broadcasting Corporation (IBC-13). Radio Philippines Network (RPN-9) and the Philippine Broadcasting Service (PBS) constitute the government radio network.