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  1. or download this
    my @all_keywords = (qw(one two three ));
    my @mandatory_keywords = (qw(two three ));
    ...
    three = 'name="O\'Hara"'
    ONE="xyz\t"
    END
    
  2. or download this
    my %statement = (
        one => 'xyz\t',
        two => 'a_34',
        three => q{name="O\'Hara"},
    );
    
  3. or download this
    #!/usr/bin/perl -w
    use strict;
    ...
    three    -> <name="O\'Hara" two=a_34>
    four     -> <'one' two>
    five     -> <ah!>
    
  4. or download this
    q{one="two=xyz" two=abc}
    #      ^embedded keyword pattern
    
    q{one="xyz two=abc three= efg"}
    #          ^missing quotes^