\da digit
Character Class[[:punct:]] [:punct:]a punctuation character [!"#$%&'()*+,\-./:;<=>?@[\]^_`{|}~]
\s*any whitespace character, repeated any number of times
\[the literal [ (9110 / 1338 / 5B16)
Group 2([a-zA-Z\s[[:punct:]]*) Character Class[a-zA-Z\s[[:punct:]]* *matches any number of characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
A-Zone character from A (6510) to Z (9010) (case sensitive)
\sany whitespace character
[the literal [ (9110 / 1338 / 5B16)
[:punct:]a punctuation character [!"#$%&'()*+,\-./:;<=>?@[\]^_`{|}~]
\s*any whitespace character, repeated any number of times
{the literal { (12310 / 1738 / 7B16)
.*any character (except for line terminators), repeated any number of times
}the literal } (12510 / 1758 / 7D16)
\s*any whitespace character, repeated any number of times
\]the literal ] (9310 / 1358 / 5D16)
g modifier: global. Finds all matches instead of stopping after the first