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Barlow ’s contention that water “ must be declared a public trust ” has its basis in her involvement with water rights issues going back to the Canada-US Free Trade Agreement in the 1980s , when water was under consideration as a tradable good under the terms of that agreement .
 Barlow, Free Trade Agreement
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Barlow, Free Trade Agreement