Complex sentence: The horses are monitored for diseases such as equine infectious anemia, an outbreak of which was discovered and subsequently eliminated on Shackleford in 1996, and they are safeguarded from traffic on the North Carolina Highway 12.
Split into simpler sentences: The horses are monitored for diseases such as equine infectious anemia, an outbreak of which was discovered and subsequently eliminated on Shackleford in 1996. They are safeguarded from traffic on the North Carolina Highway 12.