use v5.14;
use Regexp::Grammars;

my $sentence = "Show me the money";

my $grammar = qr{
    <nocontext:>
    <Sentence>
    <rule: Sentence>    <VerbGroup> <NounGroup>
    <rule: VerbGroup>   <Verb> <VPostfix>?
    <rule: Verb>        <.Word>
    <rule: NounGroup>   <NPrefix>? <Noun>
    <rule: Noun>        <.Word>
    <rule: VPostfix>    me | us | them
    <rule: NPrefix>     a | an | the | some
    <rule: Word>        \w+
}x;


sub parse {
    my $s = shift;
    say "The sentence is: $s";
    if ($s =~ $grammar) {
        use Data::Dumper;
        print Dumper \%/;
    }
    else {
        say "I did not understand you."
    }
}

parse ($sentence);