[PAR] [TLE] Wade-Dahl-Till valve [SEP] The Wade-Dahl-Till (WDT) valve is a cerebral shunt developed in 1962 by hydraulic engineer Stanley Wade, author Roald Dahl, and neurosurgeon Kenneth Till. [PAR] [TLE] Roald Dahl [SEP] Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990) was a British novelist, short story writer, poet, screenwriter, and fighter pilot.  His books have sold more than 250 million copies worldwide.
[PAR] [TLE] Wade - Dahl - Till valve [ SEP ] The Wade - Dahl - Till ( WDT ) valve is a cerebral shunt developed in 1962 by hydraulic engineer Stanley Wade , author Roald Dahl , and neurosurgeon Kenneth Till . [PAR] [TLE] Roald Dahl [ SEP ] Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990 ) was a British novelist , short story writer , poet , screenwriter , and fighter pilot . His books have sold more than 250 million copies worldwide .
Wade-Dahl-Till valve was partially built by the novelist of what nationality?
Wade - Dahl - Till valve was partially built by the novelist of what nationality ?
British
British