This worked for me:

#!/usr/bin/perl

use strict;
use warnings;
use SOAP::Lite;
use SOAP::WSDL;

my $soap =  SOAP::Lite->service('http://www.webservicex.net/globalweat
+her.asmx?WSDL');
$soap->GetCitiesByCountry('Singapore');

print $soap, "\n";
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