<http://schema.org/alternativeHeadline>
"About half of a new study's participants said that diet was the main cause of obesity, while about 40 percent cited a lack of exercise."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/what-causes-obesity-your-answer-may-affect-your-weight>