1687
Thereby an alternative type of La mRNA was identified that differed from the known La mRNA due to an exchange of the exon 1 .
 DNA: exon 1; RNA: La mRNA; RNA: La mRNA
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: exon 1, La mRNA, La mRNA 
Answer:
 DNA: exon 1; RNA: La mRNA; RNA: La mRNA