Question: Albert Sammt was a German commander of rigid airships that were patented in Germany in 1895, and in the United States in what  year?
Sentence (from "R38-class airship"): Its destruction was the first of the great airship disasters, followed by the Italian-built US semi-rigid airship "Roma" in 1922 (34 dead), the French "Dixmude" in 1923 (52 dead), the British R101 in 1930 (48 dead), the  in 1933 (73 dead), and the German "Hindenburg" in 1937 (36 dead).
Relevant evidence: No