user: Question: What is the constellation for Open cluster?
Columns: ['NGC number', 'Object type', 'Constellation', 'Right ascension ( J2000 )', 'Declination ( J2000 )']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2903.0, 'Spiral galaxy', 'Leo', '09h32m09.7s', '°30′03″']
SQL:

assistant: SELECT "Constellation" FROM "Table" WHERE "Object type" = 'Open cluster';