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He then returned to former club Villarreal in order to train with them during the rest of the pre-season period and prove his fitness .
 organization: Villarreal
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Villarreal 
Answer:
 organization: Villarreal