44689
A product of Real Betis 's youth system , he made his debut for the first team against Real Sociedad , on 4 December 2004 ( nine minutes , 0 – 1 away loss ) .
 Real Betis, Real Sociedad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Real Betis, Real Sociedad