I am adapting Lingua::Concordance. It takes all occurences of $query and show it with its context in a ordered way.

Here is the code

$text="Oldfield's career began fairly early, playing <1> acoustic guit
+ar in local folk clubs. At this time, he already had two fifteen-minu
+te instrumental pieces in which he would "go through all <2>sorts of 
+moods", precursors to his landmark 1970s' compositions. In his early 
+teens, Oldfield was involved in a 'beat group' <3>playing Shadows-sty
+le music (he has often cited Hank Marvin as a major influence, and wo
+uld later cover The Shadows' song "Wonderful Land")."

$query="in";

    while ( $text =~ /$query/gi ) {

        my $match   = $1;
        my $pos     = pos( $text );
        my $start   = $pos - $self->radius - length( $match );
        my $extract = '';
        
        if ( $start < 0 ) {
        
            $extract = substr( $text, 0, $width + $start + length( $ma
+tch ));
            $extract = ( " " x -$start ) . $extract;
            
        }
        
        else {
        
            $extract = substr( $text, $start, $width + length( $match 
+));
            my $deficit = $width + length( $match ) - length( $extract
+ );
            if ( $deficit > 0 ) { $extract .= ( " " x $deficit ) }
        
        }
        
        push @lines, $extract;
    }
[download]

What I am trying to do is to read the <> tag and associate it to the corresponding $extract (for example: "guitar in local folk" seen after <1>)