claim: Hair (musical) is a musical.
evidence: The 24 cm SK L / 30 `` Theodor Otto '' -LRB- SK - Schnelladungskanone -LRB- Fast-loading cannon -RRB- L - Lange -LRB- with a 30 caliber barrel -RRB- was a German railroad gun used in World War I. Four were built and saw service in 1918 on the Western Front .. World War I. World War I. caliber. caliber. German. Military of Germany. railroad gun. railroad gun. Western Front. Western Front ( World War I )