NLP search for catalog

[mishaschwartz]

Users who don't know exactly what they are looking for in the catalog should be able to provide a natural language query that can be used to generate a catalog search query.

Existing work has been done by CRIM and can be found here:

• https://github.com/crim-ca/pavics-jupyter-images/tree/master/nlp/notebooks/nl2query
• https://github.com/crim-ca/pavics-jupyter-images/blob/master/nlp/notebooks/nl2query/NL2Query_showcase.ipynb (examples)

To enable the NLP jupyter kernel and python notebooks in a PAVICS deployment use these settings:

• https://github.com/bird-house/birdhouse-deploy/blob/3a8cf31/birdhouse/env.local.example#L232-L260

TODO:

• improve the baseline algorithm developed by CRIM
• create a front end that receives the natural language query from the user