$VAR1 = {
  '1' => {
    'name' => 'servicea',
    'serviceid' => '1',
    'host' => [
      'hosta',
      'hostb'
    ]
  },
  '2' => {
    'name' => 'serviceb',
    'serviceid' => '2',
    'host' => [
      'hostc'
    ]
  }
};

hosta hostb