Complex sentence: Incumbent President Paul von Hindenburg was 84 years old and in poor health-never enthusiastic about the presidency (or public office in general), Hindenburg had planned to stand down after completing his first term.
Split into simpler sentences: Incumbent President Paul von Hindenburg was 84 years old and in poor health. Never enthusiastic about the presidency (or public office in general), Hindenburg had planned to stand down after his first term.