#!/usr/bin/perl
use v5.14;

my $sentence = "Show me the money";

my $grammar = qr{
    <nocontext:>
    <Sentence>
    <rule: Sentence>    <VerbGroup> <NounGroup>
    <rule: VerbGroup>   <Verb> | <Verb> me
    <rule: Verb>        <Word>
    <rule: NounGroup>   <Noun> | a <Noun> | the <Noun>
    <rule: Noun>        <Word>
    <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);