Complex sentence: After his horse stumbled in the Rapidan River and dumped him into the water on April 28,1863, Kane developed a case of pneumonia, which sent him to a Baltimore, Maryland, hospital, where he remained through June.
Split into simpler sentences: After his horse stumbled in the Rapidan River and dumped him into the water on April 28,1863, Kane developed a case of pneumonia. He was sent to a Baltimore, Maryland, hospital, where he remained through June.