user: Question: What is the largest ethnic group (2002) when cyrillic name is Брестач?
Columns: ['Settlement', 'Cyrillic Name', 'Type', 'Population (2011)', 'Largest ethnic group (2002)', 'Dominant religion (2002)']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Pećinci', 'Пећинци', 'village', 2581.0, 'Serbs', 'Orthodox Christianity']
SQL:

assistant: SELECT "Largest ethnic group (2002)" FROM "Table" WHERE "Cyrillic Name" = 'Брестач';