<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/04/640x435/54c1b28a9924d_-_hbx-upside-down-house-2-sdhbpe-de-mdn.jpg>
<http://www.elledecor.com/life-culture/travel/a6450/upside-down-house-china-housebeautiful/>