>>23448798
That's cool.

German is so much more fun than the hopelessly mutilated language English.

How cool aren't relative pronouns? For the word form you choose gender and number to agree with the antecedent, the noun it's referring to, and you choose case to show the pronoun's role in the relative clause.

>Ich kenne die Frau, die das Buch geschrieben hat, das Du gelesen hast.

"Die" in the second clause is a pronoun referring back to Frau, agreeing with Frau in gender and number, and being in the nominative case because it's the subject of that clause.

"Das" in the third clause is a pronoun referring back to Buch, agreeing with Buch in gender and number, and being in the accusative case because it's the object of that clause.

That's so much cooler than:
>I know the woman who wrote the book that you read.