'Golf', 'groups' => [ [ 'name' => 'Rabbits', 'persons' => [ [ 'firstName' => 'Daniel', 'lastName' => 'Smith', ], [ 'firstName' => 'William', 'lastName' => 'Smith', ], ], ], [ 'name' => 'Snakes', 'persons' => [ [ 'firstName' => 'Jacob', 'lastName' => 'Thomson', ], [ 'firstName' => 'Emma', 'lastName' => 'Thomson', ], ], ], ], ];