In this task, given a sentence in the English language, your task is to convert it into English Tokens.
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Question: Prior to the arrival of troops, Haiti had not encountered problems related to the disease since the 1800s.

Answer: Prior to the arrival of troops , Haiti had not encountered problems related to the disease since the 1800s .

Question: Lt. Vernon said, "We're lucky more people were not injured in this attack."

Answer: Lt. Vernon said , '' We 're lucky more people were not injured in this attack . ''

Question: One of the reasons for its significant popularity is the inclusion of several features not found in competing office suites, including in-built export to the PDF format and compatibility with Windows, Linux and Mac OS X operating systems.

Answer:
One of the reasons for its significant popularity is the inclusion of several features not found in competing office suites , including in-built export to the PDF format and compatibility with Windows , Linux and Mac OS X operating systems .