Given the task definition and input, reply with output. In this task, given a sentence in the English language, your task is to convert it into English Tokens.

The launch was originally planned for yesterday, but delayed for the launch of the Space Shuttle Endeavour, which was itself later delayed again due to another hydrogen fuel leak.
The launch was originally planned for yesterday , but delayed for the launch of the Space Shuttle Endeavour , which was itself later delayed again due to another hydrogen fuel leak .