for $a in doc("sortie-treetagger-3208.xml")//item
for $b in $a//element
let $sibling := $b/following-sibling::element[1]
let $secsibling := $b/following-sibling::element[2]
where $b/data[1] = "NOM" and $sibling/data[1] = "PRP" and $secsibling/data[1] = "NOM"
return <patron>{$b/data[3]/text(), ' ', $sibling/data[3]/text(), ' ', $secsibling/data[3]/text()}</patron>