Unable to classify Indiana as IN

[mlptownsend]

https://parser.demo.geocode.earth/demo/#indianapolis%2C%20in

The parser doesn't seem to recognize "IN" for Indiana as a region. You can see it on the live demo site, as linked above.

Another example w/ a full random address I picked on the map:
https://parser.demo.geocode.earth/demo/#1441%20Brown%20Ave%2C%20Whiting%2C%20IN%2046394

[missinglink]

Hmm interesting, it seems to work fine for other US state abbreviations.

I don't have the time to look into this right now, but I checked that the dictionaries do include the abbreviation:
https://github.com/pelias/parser/tree/master/resources/whosonfirst/dictionaries/region

[missinglink]

Agh so I did end up having a quick look at it, the cause is this line due to the token IN being classified as an English Stop Word.

One potential solution is to exclude in as a stopword by adding a config file containing the negation !in:

cat resources/pelias/dictionaries/libpostal/en/stopwords.txt
!in

================================================================
SOLUTIONS (1ms)
----------------------------------------------------------------
(0.93) ➜ [
  { housenumber: '1441' },
  { street: 'Brown Ave' },
  { locality: 'Whiting' },
  { region: 'IN' },
  { postcode: '46394' }
]

[missinglink]

This was resolved in #195 by adding !in to resources/pelias/dictionaries/libpostal/en/stopwords.txt

See also: #195 (review)