^start of line
\s*a Unicode whitespace character, repeated any number of times
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
Group 1(\w+\s+\d+\s+\d+\s+) \w+a Unicode word character, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
\w+a Unicode word character, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string