2nd example: data too far from results

[ericprud]

Mouse highlighting in the 2nd example connects the data to the results. The paragraph in between on ShapeMaps "The four RDF data nodes inst:Alice..." in the middle makes it unlikely that the browser will render both at the same time.

propose:

1. precede the example with a brief introduction of the data nodes.
2. move the paragraph on ShapeMaps below the results.