New to Mathematica but this is too weird. Many examples from the doc work correctly on my Raspberry Pi but not on the PC version of Mathematica I just downloaded.
The PC version of Mathematica is not as new as the one on the Raspberry Pi. The Raspberry Pi version is a beta version of Mathematica 10. The PC version is currently at a released version of Mathematica 9. The various new elements of the Wolfram Language (such as EntityProperties) are not yet available in the currently released version of Mathematica 9.