I hear it's not correct to use an indefinite article after "of". But i don't know exactly in which cases it's correct and in which not.
And also, maybe it doesn't only apply to the word "of". Maybe there are other words like that after which people don't use articles.
The question is: when do i use an article, and when not, when it comes to such a word as "of"?
And also, do i use it correctly in this sentence?
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