5622
The treatment strategy was evaluated in a ( non - spatial ) spontaneous novel object recognition ( NOR ) task in young rats ; a water maze spatial learning and recall procedure in aged , cognitively - impaired rats , and a delayed match to sample ( working / short term memory ) task in aged rhesus monkeys .
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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:
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