https://towardsdatascience.com/create-dumbbell-plots-to-visualize-group-differences-in-r-3536b7d0a19a
https://www.brookings.edu/articles/pakistans-always-troubled-democracy-is-on-the-brink-once-again/
http://www.ipg-journal.de/regionen/nordamerika/artikel/detail/die-ordnung-zerfaellt-2684/