6138
Extracellular signal-regulated protein kinase (ERK)-dependent and ERK-independent pathways target STAT3 on serine-727 in human neutrophils stimulated by chemotactic factors and cytokines .
 protein: cytokines; protein: chemotactic factors; protein: STAT3
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: cytokines, chemotactic factors, STAT3 
Answer:
 protein: cytokines; protein: chemotactic factors; protein: STAT3