<http://schema.org/headline>
"\u4EE5 Postcrossing \u7684\u65B9\u5F0F\u74B0\u904A\u4E16\u754C"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.lomography.hk/magazine/96154-travelling-around-the-world-by-postcrossing>