Complex sentence: His cousin, 14-year-old Eric Wolfgang, in pulling Todd out of the hole, saved Todd's life, as the plume of hot steam billowing from the hole was measured as containing a lethal level of carbon monoxide.
Split into simpler sentences: His cousin, 14-year-old Eric Wolfgang, pulled Todd out of the hole and saved his life. The plume of hot steam billowing from the hole was measured and found to contain a lethal level of carbon monoxide.