2457
As a likely consequence of these events, thrombin activated the nuclear factor NF-kB .
 protein: thrombin; protein: nuclear factor NF-kB
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: thrombin, nuclear factor NF-kB 
Answer:
 protein: thrombin; protein: nuclear factor NF-kB