user: Question: What were the remarks for a destination under 19 and rank less than 5?
Columns: ['Rank', 'Airline', 'Country', 'Destination number', 'Remarks']
Types: ['real', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Cubana de Aviación', 'Cuba', 35.0, 'Operational since 1929']
SQL:

assistant: SELECT "Remarks" FROM "Table" WHERE "Destination number" < 19.0 AND "Rank" < 5.0;