user: Question: Name the lower index kcal/ nm3 for 61.32
Columns: ['Fuel gas', 'Upper index Kcal/ Nm 3', 'Lower index Kcal/ Nm 3', 'Upper index MJ/ Nm 3', 'Lower index MJ/ Nm 3']
Types: ['text', 'real', 'real', 'text', 'text']
Sample row: ['Hydrogen', 11528.0, 9715.0, '48.23', '40.65']
SQL:

assistant: SELECT "Lower index Kcal/ Nm 3" FROM "Table" WHERE "Upper index MJ/ Nm 3" = '61.32';