Assertion: zeppelin's airship | /r/HasProperty | built
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text: After a total of six flights made over a three-week period from the Zeppelin dockyards where the airship had been built, Hindenburg was ready for its formal public debut with a 6,600 km (4,100 mi) propaganda flight around Germany (Die Deutschlandfahrt) made jointly with the Graf Zeppelin from March 26 to 29.