4968
This plan was considered to be reasonably cost-effective , but had the drawback of requiring highway ramps stacked up as high as immediately adjacent to the Charles River .
 location: Charles River
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: Charles River