Complex sentence: The Vatican has often been accused by critics of being excessively wealthy, for example in Avro Manhattan's "The Vatican Billions", however the papal state has previously run budget deficits and obtains much of its money from international donations such as Peter's Pence.
Split into simpler sentences: The Vatican has often been accused by critics of being excessively wealthy, as in Avro Manhattan's "The Vatican Billions". However, the papal state has previously run budget deficits and obtains much of its money from international donations such as Peter's Pence.