TASK DEFINITION: In this task, given a sentence in the English language, your task is to convert it into English Tokens.
PROBLEM: Last year, another zoo worker was seriously injured by Tatiana while attempting to feed her, but survived the attack.

SOLUTION: Last year , another zoo worker was seriously injured by Tatiana while attempting to feed her , but survived the attack .

PROBLEM: Iran has said it might close the strait if its nuclear program were attacked.

SOLUTION: Iran has said it might close the strait if its nuclear program were attacked .

PROBLEM: So far, the United States has pledged $1 billion in aid.

SOLUTION:
So far , the United States has pledged $ 1 billion in aid .