Twelve countries signed the Antarctic Treaty in 1959, and thirty-eight have signed it since then.
The Antarctic Treaty was signed in 1959 by 12 countries.More countries have signed the treaty since then.
The Antarctic Treaty was signed in 1959 by 12 countries.More countries have signed the treaty since then.
Use simpler wording: Twelve countries signed the Antarctic Treaty in 1959, and thirty-eight have signed it since then. Output: