sentences:  Theodore Theodorsen
  
  Theodore Theodorsen (January 8, 1897 – November 5, 1978) was a Norwegian-American theoretical aerodynamicist noted for his work at NACA (the forerunner of NASA) and for his contributions to the study of turbulence.Theodorsen was born at Sandefjord in Vestfold, Norway to parents Ole Christian Theodorsen, a chief engineer in the Norwegian merchant marine, and his wife Andrea Larsen.