user: Question: what is the 1-letter for the amino acid Asparagine?
Columns: ['Amino Acid', '3-Letter', '1-Letter', 'Side-chain polarity', 'Side-chain charge (pH 7.4)', 'Hydropathy index']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Alanine', 'Ala', 'A', 'nonpolar', 'neutral', '1.8']
SQL:

assistant: SELECT "1-Letter" FROM "Table" WHERE "Amino Acid" = 'Asparagine';