77740
A year before completion , in February 1961 , the dam began to inundate a portion of the Savannah River to create the reservoir .
 location: Savannah River
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Savannah River 
Answer:
 location: Savannah River