20357
Of the many applications of metagenomics , researchers such as Jo Handelsman , Jon Clardy , and Robert M. Goodman , explored metagenomic approaches toward the discovery of biologically active molecules such as antibiotics .
 Jo Handelsman, Jon Clardy, Robert M. Goodman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jo Handelsman, Jon Clardy, Robert M. Goodman