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An exogenously expressed Cbf alpha 2 -encoded subunit ( CBF alpha 2-451 ) stimulated transcription from the SL3 enhancer in P19 and HeLa cells .
 cell line: HeLa cells; protein: Cbf alpha 2; DNA: SL3 enhancer; protein: CBF alpha 2-451; protein: P19; protein: CBF alpha; protein: Cbf alpha 2 -encoded subunit
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: HeLa cells, Cbf alpha 2, SL3 enhancer, CBF alpha 2-451, P19, CBF alpha, Cbf alpha 2 -encoded subunit 
Answer:
 cell line: HeLa cells; protein: Cbf alpha 2; DNA: SL3 enhancer; protein: CBF alpha 2-451; protein: P19; protein: CBF alpha; protein: Cbf alpha 2 -encoded subunit