instruction:
In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.
question:
" We need to do our human testing , don 't want to have any more deliveries by waiting for vaccination of a test subject .
answer:
Changed


question:
What good reason do you have for questioning my two guest 's ultimatum ? "
answer:
Changed


question:
Hippos went to shore at dusk to feed , when it was cool enough so they wouldn 't risk poisoning or dehydration .
answer:

Changed