user: ### NOW ANSWER:
Question: what is the birth date when the weight (kg) is 100 and the world rank is 2?
Columns: ['Nation', 'Birth date', 'Height (m)', 'Weight (kg)', 'World Rank']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Australia (AUS)', '1958-04-14', '1.83', '110', '9']
SQL:

assistant: SELECT "Birth date" FROM "Table" WHERE "Weight (kg)" = '100' AND "World Rank" = '2';