<http://schema.org/alternativeHeadline>
"No dog or cat is 100 percent allergen-free, but certain breeds are less likely to make you sneeze. A HEPA filter goes a long way in combating allergies, too."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/allergies/questions/is-there-such-a-thing-as-a-hypoallergenic-dog>