{{tag>Brouillon}}

~~NOCACHE~~

= Start

<table ?p "Person" ?birthday "Birthday" ?birthplace "Birthplace" ?contact "Contact">
?p is a: person

optional {
  ?p Contact [link]: ?contact
}

?p Birthday [date]: ?birthday
--?p Birthplace  [page::places]: ?birthplace
--?birthplace = London

union {
  {
    ?p Birthplace  [page::places]: ?birthplace
    ?birthplace = London
  }
  
  {
    ?p Birthplace  [page::places]: ?birthplace
    ?birthplace = Nine Miles
  }
}
</table>