<http://schema.org/mainEntityOfPage>
<http://www.popularmechanics.com/home/interior-projects/how-to/a20282/double-the-life-of-your-water-heater/True>
<http://www.popularmechanics.com/home/interior-projects/how-to/a20282/double-the-life-of-your-water-heater/>