2392
Widely distributed throughout temperate regions of the world , predominantly in Europe , the plant is a hardy perennial that blooms in the summer months on grasslands , wetlands , and riverbanks , and is classified as an invasive weed in many parts of North America .
 Europe, North 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:
 Europe, North America