Complex sentence: Thousands of people make the trip every year to Virginia's Eastern Shore to see the now-famous "Pony Penning" which includes a swim across Assateague Channel and the auction, helping both the community and the herd of wild ponies.
Split into simpler sentences: Thousands of people make the trip every year to Virginia's Eastern Shore to see the now-famous "Pony Penning". This includes a swim across Assateague Channel and the auction, helping both the community and the herd of wild ponies.