timestamp	ip	host	browser	uri
20181103-08:36:04	173.252.95.2	173.252.95.2	facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)	/robots.txt
20210706-23:47:37	173.252.95.2	fwdproxy-atn-002.fbsv.net	facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)	/robots.txt