user: Question: Tell me the right ascension for Open cluster and NGC number more than 2547
Columns: ['NGC number', 'Object type', 'Constellation', 'Right ascension ( J2000 )', 'Declination ( J2000 )', 'Apparent magnitude']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [2516.0, 'Open cluster', 'Carina', '07h58m', '°45′', 3.8]
SQL:

assistant: SELECT "Right ascension ( J2000 )" FROM "Table" WHERE "Object type" = 'Open cluster' AND "NGC number" > 2547.0;