You will be given a definition of a task first, then some input of the task.
In this task, given a sentence in the English language, your task is to convert it into English Tokens.

An eyewitness, who had been drinking outside the pub at the time, said the boy was one of three playing football in the car park when a teenager, believed to be male, on a BMX bicycle fired three shots at the group from approximately 30 metres away, one hitting the victim in the neck.
Output:
An eyewitness , who had been drinking outside the pub at the time , said the boy was one of three playing football in the car park when a teenager , believed to be male , on a BMX bicycle fired three shots at the group from approximately 30 metres away , one hitting the victim in the neck .