72555
The current extent of Hudson Bay , the Great Lakes and other major lakes of North America are a consequence of the Canadian Shield 's readjustment since the last ice age ; different shorelines have existed over the course of Quaternary time .
 Hudson Bay, Great Lakes, North America, Canadian Shield
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hudson Bay, Great Lakes, North America, Canadian Shield