user: Question: How many casualties from the Combat in the Fayzabad Area?
Columns: ['Date', 'Location', 'Nature of incident', 'Circumstances', 'Casualties']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2009-02-11', 'Mazar-i-Sharif', 'unknown', 'unknown', '1 killed']
SQL:

assistant: SELECT SUM("Casualties") FROM "Table" WHERE "Circumstances" = 'Combat' AND "Location" = 'Fayzabad Area';