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Among Peirano ’s earliest professional works were the TV series Plan Z ( 1997 ) , which he co-wrote , and El Factor Humano ( The Human Factor , 1998 ) , which he co-directed with former classmate Álvaro Díaz .
 Peirano, El
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Peirano, El