Complex sentence: St. Peter's Church in Monkwearmouth, Sunderland and St. Pauls in Jarrow also hold significant historical value and have a joint bid to become a World Heritage Site.
Split into simpler sentences: St. Peter's Church in Monkwearmouth, Sunderland along with St. Pauls in Jarrow also hold significant historical value. They have a joint bid to become a World Heritage Site.