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In 1998 Obrascón merged with its larger , but struggling , rival Huarte , a major construction firm established in Pamplona in 1927 .
 Obrascón, Huarte, Pamplona
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Obrascón, Huarte, Pamplona