pronouns - Which is correct here, "your" or "yours"?

I know that

• "Your" is a determiner and,



• "Yours" is a possessive pronoun.

I had a case where I wasn't sure if it should be used as a determiner or pronoun:

In response from your and someone's answers

OR

In response from yours and someone's answers

Which was the correct use?

Answer

Your is a possessive adjective:

Your raincoat is red.

Whereas yours is a possessive pronoun:

That raincoat of yours is red.

Yours, the possessive pronoun is used to refer to a thing or things belonging to or associated with the person or people that the speaker is addressing.

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With your example phrase:

In response from your and someone's answers.

You could say:

In response to your and someone's answer, it could be concluded that....

or alternatively:

In response to someone's answer and [also] yours, it could be concluded that...

With the latter example, the possesive pronoun yours is referring to the answer.