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.

According to the Observatory, seismic activity caused a major lahar, similar to a mudslide or landslide, to occur in the Drift River Valley.
Output:
According to the Observatory , seismic activity caused a major lahar , similar to a mudslide or landslide , to occur in the Drift River Valley .