http://data.gdeltproject.org/gdeltv3/web/ngrams/20200223101500.1gram.txt.gz
http://data.gdeltproject.org/gdeltv3/web/ngrams/20200223101500.2gram.txt.gz
http://data.gdeltproject.org/gdeltv3/web/ngrams/20200223101500.chargram.txt.gz