You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Saint_Helena

Context:
In 1840, St Helena became a provisioning station for the British West Africa Squadron, preventing slavery to Brazil (mainly), and many thousands of slaves were freed on the island. These were all African, and about 500 stayed while the rest were sent on to the West Indies and Cape Town, and eventually to Sierra Leone.

Question:
How many slaves were freed from the island?

many thousands