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Germ - line mutations of the BRCA1 gene are responsible for a substantial proportion of families with multiple cases of early - onset breast and / or ovarian cancer .
 Disease: breast and / or ovarian cancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: breast and / or ovarian cancer