my (%person1, %person2, %person3, ...);
    $person1 {name} = "...";
    $person1 {age}  =  ...;
    $person2 {name} = "...";
    $person2 {aeg}  =  ...;   # Oopsie.
    $person3 {name} = "...";
    $person3 {age}  =  ...;