Complex sentence: Despite the seemingly dangerous nature of the job, fatalities from jumping are infrequent, the best-known fatalities in the United States being those that occurred at the Mann Gulch Fire in 1949 and the South Canyon Fire in 1994.
Split into simpler sentences: Despite the seemingly dangerous nature of the job, fatalities from jumping are infrequent. The best known fatalities in the United States being those that occurred at the Mann Gulch Fire in 1949, and the South Canyon Fire in 1994.