Complex sentence: Director Ole Christian Madsen had read the book "They Saw It Happpen" about the Nazi Resistance when he was 12, and, was especially attracted by the story of the pair because of their moral ambiguity.
Split into simpler sentences: Director Ole Christian Madsen had read the book "They Saw It Happpen" about the Nazi Resistance when he was 12. He was especially attracted by the story of the pair because of their moral ambiguity.