<http://schema.org/about>
"When their diving session was interrupted by orcas, the Howards climbed  into their boat and were amazed to see the animals play in the wake like dolphins."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/videos/watch-orcas-play-in-the-wake-of-a-speedboat>