Post process adjective clause

Similarly, if you have:
```
(ConceptNode "restaurants@021e40f7-4044-47c7-a74e-d12280c68f6f" (stv 0.001 0.99000001))
```
Then you can get the WordIntanceNode with (cog-node 'WordInstanceNode (cog-name (ConceptNode "restaurants@021e40f7-4044-47c7-a74e-d12280c68f6f"))).  From which you get the WordNode, then the (ConceptNode "restaurant")