87373
In Milwaukee , an atmospheric concentration of 1.9 " ng / m has been measured , and this source alone was estimated to account for 120 " kg / year of PCBs entering Lake Michigan .
 Milwaukee, Lake Michigan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Milwaukee, Lake Michigan