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

Example Input: The historically close relations between Canada and the U.S. was evident during the recent Virgin Atlantic incident, where a flight was intercepted by 2 Canadian CF-18 jet fighters.
Example Output: The historically close relations between Canada and the U.S. was evident during the recent Virgin Atlantic incident , where a flight was intercepted by 2 Canadian CF-18 jet fighters .

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

Example Input: Ivan Brackin, a resident of Yoron Island, described his experience of the earthquake.
Example Output:
Ivan Brackin , a resident of Yoron Island , described his experience of the earthquake .