793
In fact , iodine and thyroxine also stimulate the spectacular apoptosis of the cells of the larval gills , tail and fins in amphibians metamorphosis , and stimulate the evolution of their nervous system transforming the aquatic , vegetarian tadpole into the terrestrial , carnivorous frog .
 animal: frog
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: frog