user: Question: WHAT IS THE ELEVATION OF THE unaka mountains, IN roan high bluff PEAK, AND ISOLATION LARGER THAN 1.54?
Columns: ['Rank', 'Peak Name', 'Elevation (ft)', 'Range', 'Isolation']
Types: ['real', 'text', 'real', 'text', 'real']
Sample row: [1.0, 'Mount Mitchell', 6684.0, 'Black Mountains', 1189.0]
SQL:

assistant: SELECT "Elevation (ft)" FROM "Table" WHERE "Range" = 'unaka mountains' AND "Peak Name" = 'roan high bluff' AND "Isolation" > 1.54;