12440
We found that neither PNU - 282987 nor PNU - 120596 improved spatial - learning or episodic memory by themselves .
 Chemical: PNU - 282987; Chemical: PNU - 120596
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PNU - 282987; Chemical: PNU - 120596