83479
In 1928 , while en route to Lurestan to visit a road construction site with some engineers , his group was ambushed by unknown assailants near Borujerd .
 Lurestan, Borujerd
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lurestan, Borujerd