7178
Certain primitive salamanders in the families Sirenidae , Hynobiidae and Cryptobranchidae practice external fertilisation in a similar manner to frogs , with the female laying the eggs in water and the male releasing sperm onto the egg mass .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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