Ich wollte Paulus treffen, dessen genaue Adresse ich aber nicht kannte. What is "Adresse"case ?

Hey, i need on these. i need to rewrite the sentences in the activity by replacing the bolded direct/indirect objects with the correct direct/indirect object pronouns. there are five of them.

Can someone do this for me: ? -schreibe einen geschichte über zwei jugendliche außerdische (aliens ) die sich gegen ihre eltern auflehnen.

Knowing when to use less and fewer is often something people find difficult which of these sentence is wrong