user: Question: How old is Darryll Holland's horse
Columns: ['Saddle cloth', 'Horse', 'Trainer', 'Jockey', 'Weight (kg)', 'Barrier', 'Placing']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Tawqeet (USA)', 'David Hayes', 'D Dunn', '57', 3.0, '14']
SQL:

assistant: SELECT "Barrier" FROM "Table" WHERE "Jockey" = 'Darryll Holland';