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#!/usr/bin/perl
use warnings;
...
while (my $series = $it->()) {
    print $series->summary();
}

$ ./findseries.pl cards
House of Cards [1990]
  The PM made a deadly mistake when he passed over Francis Urquhar...
House of Cards (US) [2013]
  House of Cards is an American political drama series developed a...

    args  => sub { ... },  # transform query parameters before they
                           # are passed to sprintf

    pre   => &IO::Uncompress::Unzip::unzip,  # preprocess download
                                             # before parsing