<http://schema.org/alternativeHeadline>
"While the June 21 solstice marks the start of summer in the Northern Hemisphere, it is the start of winter in the Southern Hemisphere."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/summer-solstice-marks-changing-seasons-on-earth-today>