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# returns a string for a single crossover. The input is a hash ref.
sub get_crossover {
...

  return $crossover_text;
}

# creates a link to the Movies_by_series page. It is used in series_te
+xt, get_crossover, and elsewhere.
sub search_link {
...

  return $search_text; 
}

# returns the title in italics and the start year in parentheses.
sub display_simple_movie {
...
  
  return $item;
}

# returns the title in italics and the start year in parentheses.
sub display_simple_movie {
...
  
  return $item;
}