10792
Recent studies have demonstrated the importance of the nitric oxide / cGMP / cAMP - responsive element - binding protein ( CREB ) pathway to the process of learning and memory .
 Chemical: nitric oxide; Chemical: cGMP; Chemical: cAMP
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: nitric oxide; Chemical: cGMP; Chemical: cAMP