Conversation so far:
where was the titanic leaving from and going to
The RMS Titanic sank in the North Atlantic Ocean, four days into the ship's maiden voyage from Southampton to New York City.
how many people died on the titanic
The RMS Titanic struck an iceberg and sank in the early morning of 15 April 1912, resulting in the deaths of over 1,500 people, including about 815 of the passengers.

Question: how many survived
Self-contained rewrite: how many people survived the titanic