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Nucleolin is an abundant nucleolar protein which is believed to play a role in rDNA transcription or organization, or rRNA processing .
 RNA: rRNA; protein: Nucleolin; DNA: rDNA; protein: abundant nucleolar protein
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: rRNA, Nucleolin, rDNA, abundant nucleolar protein 
Answer:
 RNA: rRNA; protein: Nucleolin; DNA: rDNA; protein: abundant nucleolar protein