Complex sentence: Open defecation was found by the WHO in 2014 to be a leading cause of diarrheal death; an average of 2,000 children under the age of five die every day from diarrhea.
Split into simpler sentences: Open defecation was found by the WHO in 2014 to be a leading cause of diarrheal death. An average of 2,000 children under the age of five die every day from diarrhea.