Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Centre of Prague' has mentioned 'Soviet' in the following places:
Occurrence Sentence Text Source
In operation there are two kinds of units: "81-71M" which is modernized variant of the Soviet Metrovagonmash 81-71 (completely modernized between 1995 and 2003) and new "Metro M1" trains (since 2000), manufactured by consortium consisting of Siemens, xc4x8cKD Praha and ADtranz.
The original Soviet vehicles "Exc4x8ds" were excluded in 1997, but one vehicle is placed in public transport museum in depot Stxc5x99exc5xa1ovice.