73061
The relationships among various cockatoo genera are largely resolved , although the placement of the cockatiel ( " Nymphicus hollandicus " ) at the base of the cockatoos remains uncertain .
 cockatiel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 cockatiel