#@@ @prefix ev: <ext-vers-uml.rdf#>. #hmm... .rdf
@prefix ev: <http://www.w3.org/2001/tag/2006/ext-vers/ext-vers-uml#> .

@prefix : <test-agent#>.
@keywords is, of, a.

p1 a ev:Act_of_Production; ev:producer a1, a2.