Changes

Marathon served as a sponsor for the [[Interstate Oil and Gas CompactCommission]]'s 2014 and 2015 annual meetings held in both Columbus, Ohio and Oklahoma City, Oklahoma.<ref>[http://www.desmogblog.com/sites/beta.desmogblog.com/files/IOGCC%20OKC%20Corporate%20Sponsors.pdf IOGCC 2014 "2015 Annual Conference: Oklahoma City, OK"], DeSmogBlog.com, accessed April 2016.</ref><ref>[https://www.documentcloud.org/documents/2798386-IOGCC-2014-Annual-Meeting-Sponsors.html IOGCC 2014 Annual Meeting Sponsors]</ref>