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Researchers used the genome to study aspects of the thylacine 's evolution and natural history , including the genetic basis of its convergence with canids , clarifying its evolutionary relationships with other marsupials and examining changes in its population size over time .
 animal: canids
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: canids