You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, given a sentence in the English language, your task is to convert it into English Tokens.

The incident, involving a lorry and a Ford Mondeo, occurred at around 01:00 UTC today (02:00 local time) on the A607 road.
Solution: The incident , involving a lorry and a Ford Mondeo , occurred at around 01:00 UTC today -LRB- 02:00 local time -RRB- on the A607 road .
Why? The above sentence is correctly translated from English to English Tokens.

New input: Twenty people since 1991 have been charged under the Security Certificate legislation in Canada.
Solution:
Twenty people since 1991 have been charged under the Security Certificate legislation in Canada .