387017
In 1915 , the city began building a Carnegie library building located on the corner of Kansas City and 6th streets in downtown Rapid City , and in 1917 the library collection moved there .
 Rapid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rapid