Complex sentence: Lance was 50 years old, had gone through 20 years of addiction to crystal meth, and was HIV positive and died of liver failure caused by a hepatitis C and HIV co-infection that year.
Split into simpler sentences: Lance was 50 years old, had gone through 20 years of addiction to crystal meth, and was HIV positive. He died of liver failure caused by a hepatitis C and HIV co-infection that year.