43552
Late every summer tens of thousands of Wilson 's phalaropes and red-necked phalaropes arrive from their nesting grounds , and feed until they continue their migration to South America or the tropical oceans respectively .
 Wilson, South America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wilson, South America