51864
In 1975 , he signed with La Liga side Real Betis but , unsettled , returned to his country of adoption a mere months after , joining F.C. Porto .
 La Liga, Real Betis, F.C. Porto
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 La Liga, Real Betis, F.C. Porto