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

Example Input: Ryanair had told pilots anybody signing a "so-called safety petition" might be dismissed.
Example Output: Ryanair had told pilots anybody signing a '' so-called safety petition '' might be dismissed .

Example Input: In January of this year Corus cut approximately 3,500 staff worldwide; 2,500 of them in Britain.
Example Output: In January of this year Corus cut approximately 3,500 staff worldwide ; 2,500 of them in Britain .

Example Input: President Evo Morales indicated that the promoters of the incidents were "industrialists" and "oligarchists" who, "using external agents", claimed to halt the reforms that have been happening in Bolivia.
Example Output:
President Evo Morales indicated that the promoters of the incidents were '' industrialists '' and '' oligarchists '' who , '' using external agents '' , claimed to halt the reforms that have been happening in Bolivia .