29422
In 2009 – 10 season , he played as an emergency central back ( against Frosinone in May 2010 ) and other positions , including right back ahead Martin Petráš in last 10 matches of the season .
 Frosinone, Martin Petráš
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:
 Frosinone, Martin Petráš