Complex sentence: He was nominated for a screenwriting Oscar for "The Story of G.I. Joe" (1945), and his novel "Methinks the Lady..." (1946) was the basis for Ben Hecht's screenplay for "Whirlpool" (1949).
Split into simpler sentences: He was nominated for a screenwriting Oscar for "The Story of G.I. Joe" (1945). Endore's novel "Methinks the Lady..." (1946) was the basis for Ben Hecht's screenplay for "Whirlpool" (1949).