DB ProjektBau
DB ProjektBau GmbH was a German company that carried out and supported large-scale railway projects for Germany's national rail carrier , Deutsche Bahn ( DB ) . 
<triplet> DB ProjektBau <subj> German <obj> country <subj> Deutsche Bahn <obj> parent organization <triplet> Germany's national rail carrier <subj> German <obj> country <subj> railway <obj> instance of <triplet> Deutsche Bahn <subj> German <obj> owned by <subj> railway <obj> product or material produced