How do I modify this regular expression syntax?

[msachdeva3]

I have a field with value like this (R14760) 16.5.2 - FRI, 27 MAY 2016 13:46:07 EDT

I want to extract 16.5.2 into a different field

I'm using eval =
I'm seeing errors like illformed expression. Any Pointers??

Is there something wrong with Syntax?

[skoelpin · Accepted solution]

Try using ...| rex \s(\d{2}\.\d\.\d)\s