<http://schema.org/description>
"A link has been discovered between a protein that triggers the formation  of blood clots and other proteins that are essential for the body's  immune system."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.biotechdaily.com/biochemistry/articles/294745928/blood_clotting_linked_to_immune_response.html>