361635
The name Ibbetsonia , published two years later , is regarded as a synonym of this genus ; John Sims had commemorated the physiologist Agnes Ibbetson with this name .
 John Sims, Agnes Ibbetson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 John Sims, Agnes Ibbetson