<http://schema.org/alternativeHeadline>
"The lines as well as the mounds researchers have excavated were also likely used as road signs of sorts to steer traders to certain towns."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/mysterious-rock-lines-marked-way-to-ancient-peru-fairs>