user: Question: What Coding has a 3’UTR sequence of 6A 4 with a GenBank id of HQ021439?
Columns: ['Variant id', '5’UTR splice', 'Coding', '3’UTR sequence', 'GenBank id']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ["AD'6A", 'AD’', '6A', '6A', 'HQ021433']
SQL:

assistant: SELECT "Coding" FROM "Table" WHERE "3’UTR sequence" = '6A 4' AND "GenBank id" = 'HQ021439';