172783
At Brookhaven National Laboratories , 40 MeV proton irradiation of a gallium metal target produces germanium-68 by proton capture and double neutron knockout , from gallium-69 ( the most common of two stable isotopes of gallium ) .
 Brookhaven National Laboratories
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Brookhaven National Laboratories