Complex sentence: Roger Victor Emile Cayrel (born December 4,1925; Bordeaux, France) is a French astronomer with main interest in stellar atmospheres, Galactical chemical evolution and metal-poor stars.
Split into simpler sentences: Roger Victor Emile Cayrel (born 4 December, 1925, Bordeaux, France) is a French astronomer. His main interests are stellar atmospheres, galactic chemical evolution and metal-poor stars.