6702
In experiment 2 , 35 ovariectomized nulliparous ( n = 16 ) and primiparous ( n = 19 ) Wistar rats were trained on place and response plus - maze tasks .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None