"Irene Ypenburg" . "Irene. " . . "Ipenburg" . "Irene H. Ypenburg"@da-DK . . "Ypenburg" . "I. H." . "I.H. Ypenburg"@nl-NL . "H." . "Irene" . "Irene Ipenburg" . . "Ypenburg, I. H. (Irene H.)" . . . . . "Irene. Ipenburg" . "I. H. Ypenburg" . "http://www.wikidata.org/entity/Q6581072" . "Ypenburg, I.H. (Irene H.)" . . . "Irene Ypenburg" . . .