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After hearing that researchers did not use anaesthesia regularly - one scientist , Emmanuel Klein told the commission he had " no regard at all " for the suffering of the animals - the commission recommended a series of measures , including a ban on experiments on dogs , cats , horses , donkeys and mules .
 Emmanuel Klein
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:
 Emmanuel Klein