timestamp	ip	host	browser	uri
20171221-21:39:03	34.215.162.243	ec2-34-215-162-243.us-west-2.compute.amazonaws.com	rogerbot/1.1 (http://moz.com/help/guides/search-overview/crawl-diagnostics#more-help, rogerbot-crawler+pr4-crawler-15@moz.com)	/robots.txt