2011
This region contains two binding sites for the Sp1 transcription factor .
 protein: Sp1 transcription factor; DNA: binding sites
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: Sp1 transcription factor, binding sites 
Answer:
 protein: Sp1 transcription factor; DNA: binding sites