295014
Michael D. Plummer of Vanderbilt University , Donald Nelson of Middle Tennessee State University , Neil Robertson of Ohio State University , and Xiaoya Zha of Middle Tennessee State University prove this conjecture in the special case where the graphs involved are also cubic .
 Vanderbilt University, Middle Tennessee State University, Neil Robertson, Ohio State University, Middle Tennessee State University
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vanderbilt University, Middle Tennessee State University, Neil Robertson, Ohio State University, Middle Tennessee State University