Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Q: Context: The Jaccard index, also known as the Jaccard similarity coefficient (originally coined coefficient de communaute by Paul Jaccard), is a statistic used for comparing the similarity and diversity of sample sets. 
 Question: Who made Jaccard index known?
A: 
paul jaccard