How to capture the MSN (Microsoft Network) bot entries from Web log file?

Here are some Web log file entries:127.0.0.1 - frank [10/May/2012:13:55:36 -0700] "GET /apache_pb.gif HTTP/1.0" 200 2326 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)" "-" 213.135.131.79 - - [13/May/2012:17:35:32 -0600] "POST /submit.jsp HTTP/1.0" 200 2326 "-" "msnbot-media/1.1 (+http://search.msn.com/msnbot.htm)" "SID=1000;LANG=EN" 213.135.131.79 - - [15/May/2012:19:21:49 -0400] "GET /features.htm HTTP/1.1" 200 9955 "http://www.abc.com/" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)" "-"

MSN Bot is a web crawler from Microsoft that obtains content for the Bing Search engine. MSN Bot uses the following user agent string:

msnbot-media/1.1 (+http://search.msn.com/msnbot.htm)

The regular expression to capture MSN Bot entries from Apache Web log file can be written as: ^.*"(.*msnbot[^"]*)".*$ with the multiple lines modifier "m" specified: m