[xzephyr]

>Whilst it is unable to assign one symbol with multiple nouns, I think these are more engineering issues than anything. The overall architecture of NELL can be made smarter with horizontally scalable knowledge inference additions.

It is not a trivial problem.[1] In fact representing knowledge as some ontology of human language strings with fixed schematics has its fundamental limitations. In many situations it simply fails, disambiguation is just one of them. For example, trustworthiness, temporal information and newly invented phrases etc.

[1]http://en.wikipedia.org/wiki/Word-sense_disambiguation