my @objarray = (
    { 'apts' => [ [11,12], [13,14], [15,16], ], },
    { 'apts' => [ [21,22], [23,24], [25,26], ], },
   ({ 'apts' => '???', }) x 87,
    { 'apts' => [ [91,92], [93,94], [95,96], ], },
    );