(?: \d+ \s+ )? # ignore size (when present)
\w+ \s+ \d+ \s+ # ignore month and date
\d+ (?: : \d+ )? \s+ # ignore time or year
(?: \d+ \s+ )? # ignore size (when present)
\w+ \s+ \d+ \s+ # ignore month and date
\d+ (?: : \d+ )? \s+ # ignore time or year