Assertion: zeppelin's airship | /r/HasProperty | last rigid
Facets:
Source sentences:
text: By the time the two Graf Zeppelins were recycled, they were the last rigid airships in the world, and heavier-than-air long-distance passenger transport, using aircraft like the Focke-Wulf Condor and the Boeing 307 Stratoliner, was already in its ascendancy.