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When he signed , he became a first choice midfielder for the club under the management of Carlos Carvalhal , and despite the club finishing in a disappointing fourth place , he was praised for his performances .
 Carlos Carvalhal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carlos Carvalhal