user: Question: What is the total number of N for the element with nuclide of 141 Pr?
Columns: ['Element', 'Nuclide', 'Z ( p )', 'N ( n )', 'isotopic mass ( u )']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['beryllium', '9 Be', 4.0, 5.0, '9.012 182(3)']
SQL:

assistant: SELECT SUM("N ( n )") FROM "Table" WHERE "Nuclide" = '141 Pr';