21433
Further , mitogen - activated protein kinases ( MAPKs ) such as c - Jun N - terminal kinases ( JNK ) , extracellular signal - regulated kinases ( Erk1 / 2 ) , and p38 were all activated .
 Chemical: N
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: N