53791
He did not , however , gain the 50 % required to avoid a run-off election , and was obliged to enter a second ballot against Martine Aubry , who had come in second with 30 % of the vote .
 Martine Aubry
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Martine Aubry