user: Question: What is the number for the moment of intertia in torsion (j) (cm 4) for the 4.7 web thickness (mm)?
Columns: ['Type', 'Beam height (mm)', 'Flange width (mm)', 'Web thickness (mm)', 'Flange thickness (mm)', 'Weight (kg/m)', 'Cross-section area (cm 2 )', 'Moment of inertia in torsion (J) (cm 4 )']
Types: ['text', 'real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['ISMB 80', 80.0, 46.0, '3.8', '5.2', '6.0', '7.64', '0.70']
SQL:

assistant: SELECT "Moment of inertia in torsion (J) (cm 4 )" FROM "Table" WHERE "Web thickness (mm)" = '4.7';