20534
We found that parasitized parents had significantly higher stress - induced , but not baseline , corticosterone than natural parents during the fledgling stage , which was associated with changes in parental care .
 Chemical: corticosterone
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: corticosterone