1847
Utilization of alternative polyadenylation signals was previously shown to generate two sialophorin mRNAs of 1 . 9 and 4 . 3 kb , which differ in the length of their 3 ' untranslated regions .
 GENE: sialophorin mRNAs of 1 . 9 and 4 . 3 kb
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: sialophorin mRNAs of 1 . 9 and 4 . 3 kb 
Answer:
 GENE: sialophorin mRNAs of 1 . 9 and 4 . 3 kb