Conversation so far:
how many episodes are there in black sails season 3
There are 10 episodes in season 3 of Black Sails
Is the third season of Black Sails the last one
There are four seasons of Black Sails.
When did the fourth season of Black Sails first air
The fourth season of Black Sails first aired on January 29, 2017
When did the series finale of Black Sails air
The series Black Sails concluded on April 2, 2017

Question: When did Starz announce that the series would end
Self-contained rewrite: When did Starz announce that Black Sails would end