837
Formica polyctena " , among other ant species , constructs nests that maintain a relatively constant interior temperature that aids in the development of larvae .
 animal: Formica polyctena
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 animal: Formica polyctena