77978
It is at the origin of the Niagara River , which flows northward over Niagara Falls and into Lake Ontario .
 Niagara River, Niagara Falls, Lake Ontario
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Niagara River, Niagara Falls, Lake Ontario