Extract word using regex expression

[nareshmg]

team,
Need help to extract the appication name from the log string, from the below log statements, i need help to get only application name. like applicationName1,applicationName2,applicationName3 ....

the only fixed items is the position of the application name,

[06-19-2018 16:20:10.20][WARN][hostname1][txnName1][uniqueid1][applicationName1][username1][threadname1] ....
[06-19-2018 16:20:10.20][WARN][hostname][txnName2][uniqueid2][applicationName2][username2][threadname2] ....
[06-19-2018 16:20:10.20][WARN][hostname][txnName3][uniqueid3][applicationName3][username3][threadname3] ....
[06-19-2018 16:20:10.20][WARN][hostname][txnName4][uniqueid4][applicationName4][username4][threadname4] ....
[06-19-2018 16:20:10.20][WARN][hostname][txnName5][uniqueid5][applicationName5][username5][threadname5] ....
[06-19-2018 16:20:10.20][WARN][hostname][txnName6][uniqueid6][applicationName6][username6][threadname6] ....

[richgalloway]

regex101.com is a great site for trying out regular expressions against sample events to see what works best. Using that, I came up with (?:\[[^\]]*\]){5}\[(?<applicationName>[^\]]*). Try it out.