Complex sentence: After 2Pacs death, Afeni and Billy sent 2Pacs blood to to long beach Genetics, who did the DNA testing to find the probability of Afeni and Billy 99.97% parentage.
Split into simpler sentences: After 2Pacs death, Afeni and Billy sent 2Pacs blood to to Long Beach Genetics. The lab tested Tupac's DNA and found out the probability of Afeni and Billy 99.97% parentage.