https://www.knewton.com/wp-content/themes/knewton-v5/assets/js/plugins/respond.js
http://freewheel.tv/library/themes/fw/assets/js/plugins/respond.js
http://physique57.com/wp-content/themes/p57/assets/js/plugins/respond.js
http://rivetedlit.com/wp-content/themes/jpdstudio/assets/js/plugins/respond.js