111515
Many autistic and some mentally disabled people engage in the echolalia of overheard words ( often their only vocal interaction with others ) without understanding what they echo .
 autistic, mentally disabled
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:
 autistic, mentally disabled