<http://schema.org/about>
"We know that dolphins have an advanced language, more complicated than most other creatures that we're aware of. But to what extent is only now being unraveled. A complex communication system is a sign of a complex"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/new-discoveries-in-dolphin-communication-reveal-use-of-diplomacy-to-avoid-fights.html>