The instruction says that we should rewrite this sentence, placing commas where they are needed. The rewritten sentence has been shown below:
Commas are important punctuation marks that are used in separating items in a list.
They prevent confusion during readings by properly grouping items. In the text above, commas were used to separate the items in a list.
For example, in the third sentence, commas were used to separate the adjectives that qualify the hallways.
In conclusion, commas were used to correctly separate words in the excerpt above.
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