4076
In the Netherlands , boomerangs have been found in Vlaardingen and Velsen from the first century BC .
 location: Netherlands; location: Vlaardingen; location: Velsen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Netherlands; location: Vlaardingen; location: Velsen