4616
Although the mechanism of LTR activation remains obscure, several lines of investigation have suggested that it is a result of activation of the NF-kappa B transcription factor (s) following signaling events related to generalized DNA damage .
 protein: transcription factor; protein: NF-kappa B; DNA: LTR
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: transcription factor, NF-kappa B, LTR 
Answer:
 protein: transcription factor; protein: NF-kappa B; DNA: LTR