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Pulse-field gel electrophoresis (PFGE) analysis showed that these genes are physically located within a DNA fragment of 250 kb .
 DNA: 250 kb; DNA: DNA fragment
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: 250 kb, DNA fragment 
Answer:
 DNA: 250 kb; DNA: DNA fragment