$VAR1 = {
    'Melbourne' => {
        'Temperature' => 'hot',
        'Currency' => 'Dollar',
        'Country' => 'Australia',
        'Size' => 'big'
    },
    'Paris' => {
        'Temperature' => undef,
        'Currency' => 'Euro',
        'Country' => 'France',
        'Size' => 'big'
    },
    'London' => {
        'Temperature' => undef,
        'Currency' => 'Sterling',
        'Country' => 'England',
        'Size' => 'big'
    }
};