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Recently , there has been a notable grassroots effort to reclaim Springfield 's once easily accessible and pedestrian-friendly waterfront , which is now separated from the city by the eight-lane , elevated highway Interstate 91 .
 Springfield, Interstate 91
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Springfield, Interstate 91