If your "bn" numbers are unique... 

my $range_start = 700;
my $range_end   = 1200;
my %out = ();
while (<>) {
    if ( /bn(\d+),/ && $1 >= $range_start && $1 <= $range_end ) {
        my $bn = $1;
        my ($when) = /^[^,]+,\w+\s+(\S+)\s/;
        $out{$bn} = $when;
    }
}
foreach my $ranger ( sort { $a <=> $b } keys %out ) {
    print $ranger, ' - ', $out{$ranger}, "\n";
}

[download]

If they are not unique... 

my $range_start = 700;
my $range_end   = 1200;
my %out = ();
while (<>) {
    if ( /bn(\d+),/ && $1 >= $range_start && $1 <= $range_end ) {
        my $bn = $1;
        my ($when) = /^[^,]+,\w+\s+(\S+)\s/;
        push @{$out{$bn}}, $when;
    }
}
foreach my $ranger ( sort { $a <=> $b } keys %out ) {
    print "$ranger - ";
    print join ', ', @{$out{$ranger}};
    print "\n";
}

[download]

Totally untested and off the top of my head, of course.

In reply to Re: Using a Range to Parse a file and pull out Data? by kyle
in thread Using a Range to Parse a file and pull out Data? by batcater98

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.