To try this example: You need to generate a `places.json` file.

In the root of this project, run `python get_lookup_table_files.py`, then `python make_json.py`. This will generate a `places.json` file in the `generated_json` directory. Grab it, and drop a copy into `examples/json` for this page to use.

It's a pretty huge json file, so matching is not particularly performant.