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  1. or download this
    @Persons = (
    {
...
        place    => "place",
    }, # etc etc...
)
  2. or download this
      <!-- this is just one of manu expressions -->
  <expr type="match">
    <field type="equal" key="age">25</field>
    <field type="equal" key="surname">aSurName</field>
  </expr>
  3. or download this
    foreach $field (@Fields) { # <- age and surname in this case
   scalar(@Persons)==0 && return 0;
...
   }
}
#return...