In this task, given a sentence in the English language, your task is to convert it into English Tokens.
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Question: "I'm feeling a lot more optimistic today than I did yesterday."

Answer: `` I 'm feeling a lot more optimistic today than I did yesterday . ''


Question: A gene has been discovered that turns stem cells into cancer killers, promising new treatments that boost the body's ability to destroy tumors.

Answer: A gene has been discovered that turns stem cells into cancer killers , promising new treatments that boost the body 's ability to destroy tumors .


Question: BP is expecting to shut down the production on its North Sea oil platforms on Thursday.

Answer:
BP is expecting to shut down the production on its North Sea oil platforms on Thursday .