user: Question: What is the horizontal bar score with a pommel horse of N/A, and the position is less than 27, and the parallel bars score is 15.800?
Columns: ['Position', 'Gymnast', 'Floor', 'Pommel Horse', 'Rings', 'Vault', 'Parallel Bars', 'Horizontal Bar', 'Total']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Jonathan Horton ( USA )', '15.350', '13.925', '15.325', '15.950', '15.525', '15.575', 91.65]
SQL:

assistant: SELECT "Horizontal Bar" FROM "Table" WHERE "Pommel Horse" = 'N/A' AND "Position" < 27.0 AND "Parallel Bars" = '15.800';