9993
Medical researchers in 1974 found a measurable and significant difference in the presence of DDT in human milk between mothers who lived in New Brunswick and mothers who lived in Nova Scotia , " possibly because of the wider use of insecticide sprays in the past " .
 location: New Brunswick; location: Nova Scotia
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: New Brunswick; location: Nova Scotia