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

Ex Input:
Democrats Hillary Clinton and Barack Obama were also campaigning in the state on Thursday.

Ex Output:
Democrats Hillary Clinton and Barack Obama were also campaigning in the state on Thursday .


Ex Input:
He said that militants active in the area had set the fires, wearing Army camouflage.

Ex Output:
He said that militants active in the area had set the fires , wearing Army camouflage .


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 .