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The naturalist David Attenborough discusses the unusual pollination systems among " Ophrys " orchids in his 1995 BBC television series ' The Private Life of Plants ' , as well as the book accompanying the series .
 David Attenborough, BBC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 David Attenborough, BBC