Assertion: stroke motorcycle | /r/HasProperty | popular
Facets:
value: worldwide
type: LOCATION
value: from the 1960s
type: TEMPORAL
Source sentences:
text: From the 1960s through the 1990s, small two-stroke motorcycles were popular worldwide, partly as a result of East German MZs Walter Kaaden's engine work in the 1950s.
text: From the 1960s through the 1990s, small two-stroke motorcycles were popular worldwide, partly as a result of East German MZs Walter Kaaden's engine work in the 1950s.
text: From the 1960s through the 1990s, small two-stroke motorcycles were popular worldwide, partly as a result of the pioneering work of the East German Daniel Zimmermann (rotary disc valve) and MZ's Walter Kaaden who developed the two-stroke expansion chamber in the 1950s.