<http://dbpedia.org/resource/BFW_M.21>	<http://dbpedia.org/ontology/numberBuilt>	"1"^^<http://www.w3.org/2001/XMLSchema#integer> .
<http://dbpedia.org/resource/BFW_M.21>	<http://dbpedia.org/ontology/designer>	<http://dbpedia.org/resource/Willy_Messerschmitt> .
<http://dbpedia.org/resource/BFW_M.21>	<http://www.w3.org/2000/01/rdf-schema#comment>	"The BFW M.21 was a single-engined biplane trainer designed by Willy Messerschmitt for the German Ministry of Transport.  It was one of only two biplanes Messerschmitt designed, neither reaching production."@en .