a The actress attended the press screening for horror film, Candyman.
b The actress attended the press screening for horror film.
Is a correct as written?
Is it an english rule that the sentence must be at least contain an essential information, and be complete to take the comma?
b doesn't make sense alone nor does it look grammatical without a determiner, so is this perhaps just stylistic choice, in say newspapers, or is it an error to use a comma this way?
And
The new businesses venture.
Does this example require an apostrophe businesses'.
What would be multiple businesses if this is just one businesses' venture. (Would you have to say: the group of businesses venture, for instance?)
Or:
The sheeps in the field. (one sheep or multiple sheep)
The sheeps are in the field (multiple sheep).
The only thing different is the context.
We may say: Sheep's verbally, not sheep is.
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panda blue 483Is a correct as written?
No. You need an article with "horror film", and no comma. "The actress attended the press screening for the horror film Candyman."
panda blue 483is it an error to use a comma this way?
Yes. With the comma, it means that there is only one horror film, Candyman.