1605
Purified human SP1 was shown to have very strong affinity for the 12-bp insert .
 protein: human SP1; DNA: 12-bp insert
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: human SP1, 12-bp insert 
Answer:
 protein: human SP1; DNA: 12-bp insert