Question: Which tennis player played for Zimbabwe, Byron Black or Onny Parun? 
Sentence (from "Onny Parun"): Onny Parun {'1': ", '2': ", '3': ", '4': "} (born 15 April 1947) is a former tennis player of Croatian descent from New Zealand, who was among the world's top 20 for five years and who reached the quarterfinals at Wimbledon in 1971 and 1972.
Relevant evidence: Yes