2211
Using females that varied in social , reproductive , and ecological context , we measured juvenile hormone ( JH ) , a major regulator of colony caste dynamics in other eusocial species .
 Chemical: juvenile hormone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: juvenile hormone