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In order to delineate the tissue-specific mechanisms governing the control of nonpituitary PRL gene expression , we have cloned and sequenced 3 kb 5'-flanking DNA of the upstream decidual/lymphoid (dPRL) promoter .
 DNA: decidual/lymphoid (dPRL) promoter; DNA: 3 kb 5'-flanking DNA; DNA: PRL gene
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: decidual/lymphoid (dPRL) promoter, 3 kb 5'-flanking DNA, PRL gene 
Answer:
 DNA: decidual/lymphoid (dPRL) promoter; DNA: 3 kb 5'-flanking DNA; DNA: PRL gene