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However , Isaacs J noted that different considerations may apply in the case of discriminatory laws , as well as in some other matters : The rule was more succinctly expressed in 1930 by Dixon J in Australian Railways Union v Victorian Railways Commissioners , where he stated : After Melbourne Corporation In 1947 , Melbourne Corporation v Commonwealth explored the nature of what constituted a discriminatory law .
 Isaacs J, Dixon J
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Isaacs J, Dixon J