In this task, given a sentence in the English language, your task is to convert it into English Tokens.

Q: This had been a very secure area for the insurgents."

A: This had been a very secure area for the insurgents . ''
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Q: The 15-year-old suspect's home and computers were searched and evidence was collected, which revealed that he allegedly tried to purchase black powder explosives and machine guns over the Internet.

A: The 15-year-old suspect 's home and computers were searched and evidence was collected , which revealed that he allegedly tried to purchase black powder explosives and machine guns over the Internet .
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Q: A gene has been discovered that turns stem cells into cancer killers, promising new treatments that boost the body's ability to destroy tumors.

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