user: Question: What are the notes of the satellite whose nssdc id number is 1959-002A?
Columns: ['Mission No.', 'Cover Name', 'Launch Date', 'NSSDC ID No.', 'Alt. Name', 'Camera', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['R&D', 'Discoverer', '21 Jan 1959', '1959-E01', '1959-E01', 'none', 'Mission Failed. Failed to achieve orbit']
SQL:

assistant: SELECT "Notes" FROM "Table" WHERE "NSSDC ID No." = '1959-002A';