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

Ex Input:
According to Navi Pillay, High Commissioner for Human Rights at the United Nations, more than 5,000 people have been killed during the Syrian uprising, a figure that includes around 300 children.

Ex Output:
According to Navi Pillay , High Commissioner for Human Rights at the United Nations , more than 5,000 people have been killed during the Syrian uprising , a figure that includes around 300 children .

Ex Input:
Fabian Cancellara of Switzerland maintained the overall lead, while Hushovd moved into second place, 29 seconds behind Cancellara.

Ex Output:
Fabian Cancellara of Switzerland maintained the overall lead , while Hushovd moved into second place , 29 seconds behind Cancellara .

Ex Input:
The breakthrough involves a gene known as TRESK, thought to control the brain's reaction to pain: if it is defective, then many normal activities and actions will be painful.

Ex Output:
The breakthrough involves a gene known as TRESK , thought to control the brain 's reaction to pain : if it is defective , then many normal activities and actions will be painful .