20043
In December 2014 , he began playing alongside Ryan Shawcross at centre-back due in place of the injured Marc Wilson .
 Ryan Shawcross, Marc Wilson
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:
 Ryan Shawcross, Marc Wilson