Complex sentence: The American Veterinary Medical Association notes fundamental problems with tracking breed in dog bite related fatalities; in a 2013 study of 256 fatalities in the United States from 2000--2009, the AVMA determined that valid breed determination was possible for only 17.6% of cases.
Split into simpler sentences: The American Veterinary Medical Association notes fundamental problems with tracking breed in dog bite related fatalities. In a 2013 study of 256 fatalities in the United States from 2000--2009, the AVMA determined that valid breed determination was possible for only 17.6% of cases.