http://data.gdeltproject.org/gdeltv3/web/ngrams/20191015073000.1gram.txt.gz
http://data.gdeltproject.org/gdeltv3/web/ngrams/20191015073000.2gram.txt.gz
http://data.gdeltproject.org/gdeltv3/web/ngrams/20191015073000.chargram.txt.gz