Complex sentence: Bovine papillomavirus (BPV) is a group of DNA viruses of the family "Papillomaviridae" that are highly prevalent in cattle, causing warts (papillomas and fibropapillomas) of the skin and alimentary tract, and more rarely cancers of the alimentary tract and urinary bladder.
Split into simpler sentences: Bovine papillomavirus (BPV) is a group of DNA viruses of the family "Papillomaviridae" that are common in cattle. Infection causes warts (papillomas and fibropapillomas) of the skin and alimentary tract, and more rarely cancers of the alimentary tract and urinary bladder.