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Transcription of the germ-line IgH genes is controlled by intervening (I) regions upstream of their switch regions.
 DNA: germ-line IgH genes; DNA: IgH genes; DNA: intervening (I) regions
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: germ-line IgH genes, IgH genes, intervening (I) regions 
Answer:
 DNA: germ-line IgH genes; DNA: IgH genes; DNA: intervening (I) regions