Mozilla/5.0 (compatible; Exabot/3.0; +http://www.exabot.com/go/robot)
Mozilla/5.0 (compatible; Exabot/3.0 (BiggerBetter); +http://www.exabot.com/go/robot)
Mozilla/5.0 (compatible; Exabot/3.0;  http://www.exabot.com/go/robot)
"GET /robots.txt HTTP/1.1" 404 287 "-" "Mozilla/5.0 (compatible; Exabot/3.0; +http://www.exabot.com/go/robot)"
Exabot/2.0