Complex sentence: Franck and Fermi had nominated him in 1947 and 1948 for his work on crystal lattices, and over the years, he had also been nominated for his work on solid state, quantum mechanics and other topics.
Split into simpler sentences: Franck and Fermi had nominated him in 1947 and 1948 for his work on crystal lattices. Over the years, he had also been nominated for his work on solid state, quantum mechanics and other topics.