user: Question: What's the total number of NGC that has a Declination ( J2000 ) of °15′55″, and an Apparent magnitude greater than 10?
Columns: ['NGC number', 'Object type', 'Constellation', 'Right ascension ( J2000 )', 'Declination ( J2000 )', 'Apparent magnitude']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [6402.0, 'Globular cluster', 'Ophiuchus', '17h37m36.2s', '°14′45″', 9.6]
SQL:

assistant: SELECT COUNT("NGC number") FROM "Table" WHERE "Declination ( J2000 )" = '°15′55″' AND "Apparent magnitude" > 10.0;