user: Question: How many missions countries have notability with President of Burundi?
Columns: ['Name', 'Notability', 'Reason for Seeking Refuge', 'Country', 'City', 'Missions Country', 'Start Date', 'End Date', 'Resolution']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['José Manuel Balmaceda', 'President of Chile', 'Defeated in the Chilean Civil War', 'Chile', 'Santiago', 'Argentina', 'August 29, 1891', 'September18,1891', 'Committed suicide']
SQL:

assistant: SELECT COUNT("Missions Country") FROM "Table" WHERE "Notability" = 'President of Burundi';