TASK DEFINITION: In this task, given a sentence in the English language, your task is to convert it into English Tokens.
PROBLEM: NASA has held a memorial ceremony to mark the fifth anniversary of the Space Shuttle Columbia disaster.

SOLUTION: NASA has held a memorial ceremony to mark the fifth anniversary of the Space Shuttle Columbia disaster .

PROBLEM: Jimmy Wales, president of the Wikimedia Foundation, said he was pleased to partner with Answers.com, encouraging software that improves access to Wikipedia.

SOLUTION: Jimmy Wales , president of the Wikimedia Foundation , said he was pleased to partner with Answers.com , encouraging software that improves access to Wikipedia .

PROBLEM: Including New Zealand which has banned Commander Bainimarama from entering New Zealand except if he is attending political crises talks.

SOLUTION:
Including New Zealand which has banned Commander Bainimarama from entering New Zealand except if he is attending political crises talks .