user: ### NOW ANSWER:
Question: What is the third stage that has the first phase of 5,443kg?
Columns: ['Parameter', '1st stage', '2nd stage', '3rd stage', '4th stage']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Gross mass', '54,431kg', '462kg', '126kg', '42kg']
SQL:

assistant: SELECT "3rd stage" FROM "Table" WHERE "1st stage" = '5,443kg';