for $article in collection(sortiexml-slurp_3208.xml)//article
for $element in $article/element
let $sonfrere := $element/following-sibling::element[1]
where $element/data[1]="ADJ" and $sonfrere/data[1]="NOM"
return string-join(($element/data[3], $sonfrere/data[3])," ")