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They would buy up undeveloped property , then use the resources of the city to improve the area - for instance by installing pipes to bring in water from the Croton Aqueduct - thus increasing the value of the land , after which they sold and took their profits .
 Croton Aqueduct
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Croton Aqueduct