Sentence:In South Africa, which has one of the best police to public ratios on the continent, the share of [e1]murders[/e1] that result in a [e2]conviction[/e2] is about 18%, compared to 56% in the US and 61% in the UK.
 e1: murders. 
 e2 : conviction.
Answer: Cause-Effect(e1,e2)