Useful links:
http://www.javascriptkit.com/javatutors/weighrandom2.shtml https://stackoverflow.com/questions/43566019/how-to-choose-a-weighted-random-array-element-in-javascript?answertab=active#tab-top
Sentence Case: https://stackoverflow.com/questions/20441876/format-lowercased-string-to-capitalize-the-begining-of-each-sentence