user: Question: How many number of screenings have an opening film of The Journey of Vaan Nguyen?
Columns: ['Year', 'Date (Opening)', 'Date (Closing)', 'Opening Film', 'Number of Screening', 'Award-Winning Film']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2004.0, 'August 30', 'September 5', 'Deconstruction of Korean Housewife', '129 films 99 televised', 'Last Home Standing']
SQL:

assistant: SELECT "Number of Screening" FROM "Table" WHERE "Opening Film" = 'The Journey of Vaan Nguyen';