320
Serum relaxin levels in prostaglandin E2 induced abortions .
 GENE: Serum relaxin
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: Serum relaxin 
Answer:
 GENE: Serum relaxin