VAG Class DT1
The VAG Class DT1 ( colloquially called "Pegnitzpfeil" ) is an electric multiple unit ( EMU ) train type operated by the Verkehrs-Aktiengesellschaft Nürnberg on the Nuremberg U-Bahn system since its opening in 1972 . 
<triplet> VAG Class DT1 <subj> Verkehrs-Aktiengesellschaft Nürnberg <obj> operator <triplet> Nuremberg U-Bahn <subj> Verkehrs-Aktiengesellschaft Nürnberg <obj> operator <subj> 1972 <obj> inception