user: Question: What is Part 1, when Part 3 is "heldu"?
Columns: ['Class', 'Part 1', 'Part 2', 'Part 3', 'Part 4']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'ríða', 'reið', 'riðu', 'riðinn']
SQL:

assistant: SELECT "Part 1" FROM "Table" WHERE "Part 3" = 'heldu';