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   Update: Oh, and:

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Update 2:

Okay, having said all the above - you could simply do something like this:

#!/usr/bin/perl -w
use strict;
use Lingua::EN::NamedEntity;

$/ = undef;
my $text = <DATA>;

my @entities = extract_entities($text);
my @unwanted_entities = qw( Monday Tuesday Wednesday Thursday Friday S
+aturday
        Sunday);

for (@entities) {
    my $entity = ${$_}{entity};
    if ( grep { $_ eq $entity } @unwanted_entities ) {
        print "Skipping unwanted entity: $entity\n";
    }
    else {
        print "Valid entity: $entity\n"
    }
}
[download]

And the data for the above code was taken from a "recent BBC News story". The output is as follows:

Valid entity: Mr Murakami
Valid entity: Takafumi Horie
Valid entity: Singapore
Valid entity: Mr Horie
Valid entity: Societe General Asset Management
Valid entity: Asset Management
Skipping unwanted entity: Friday
Valid entity: Tokyo Stock Exchange
Valid entity: Livedoor
Valid entity: Yoshiaki Murakami
Valid entity: Murakami
Valid entity: Tokyo
Valid entity: International Trade and Industry Ministry
Valid entity: Akio Yoshino
[download]

Cheers,
Darren :)