1971
We have identified and characterized a novel serine /threonine kinase that phosphorylated the proto-oncogene product , c-Fos , and is termed Fos kinase .
 protein: serine /threonine kinase; protein: Fos kinase; protein: c-Fos; protein: proto-oncogene product
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: serine /threonine kinase, Fos kinase, c-Fos, proto-oncogene product 
Answer:
 protein: serine /threonine kinase; protein: Fos kinase; protein: c-Fos; protein: proto-oncogene product