user: Question: What is the largest frequency Owned by Multicultural Broadcasting with a Format of Vietnamese?
Columns: ['Station', 'Frequency', 'Network Affiliation', 'Format', 'City of License', 'Status']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['KSFO', 560.0, 'ABC News', 'News/Talk', 'San Francisco', 'Owned by Cumulus Media']
SQL:

assistant: SELECT MAX("Frequency") FROM "Table" WHERE "Status" = 'Owned by Multicultural Broadcasting' AND "Format" = 'Vietnamese';