user: Question: How many different brief descriptions are there for crashes with 0/161 fatalities?
Columns: ['date (dd.mm.yyyy)', 'Tail number', 'Location', 'Fatalities', 'Brief description']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['19.02.1973', 'CCCP-85023', 'Prague', '66/100', 'Landed 470 m short of the runway']
SQL:

assistant: SELECT COUNT("Brief description") FROM "Table" WHERE "Fatalities" = '0/161';