Complex sentence: During their decade-long quest to travel to Tuva, Feynman was suffering from cancer, and died shortly before the visas finally arrived; this book describes'Richard Feynman's last adventure'.
Split into simpler sentences: During their decade-long quest to travel to Tuva, Feynman was suffering from cancer. Feynman died shortly before the visas finally arrived; this book describes'Richard Feynman's last adventure'.