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In collaboration with Carlo Rubbia , he performed an experiment while on sabbatical at CERN during 1965 which demonstrated robustly the expected interference effect , and also measured precisely the difference in mass of the short-lived and long-lived neutral kaon masses .
 person: Carlo Rubbia; location: CERN
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Carlo Rubbia; location: CERN