1656
These results implicate a precursor - specific base - paired structure involving sequences on both sides of the mature cleavage site in the 3 ' processing of human U2 RNA .
 GENE: human U2 RNA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: human U2 RNA