How do you make a sentence into a possessive noun phrase?

A possessive noun phrase functions as the subject of a sentence or a clause, and as the object of a verb or a preposition.

Examples:

The bicycle of the girl rested against the stairs. (noun phrase, subject of the sentence)

The girl's bicycle rested against the stairs. (possessive noun phrase, subject of the sentence)

We enjoyed the location of the cabin on the lake. (noun phrase, direct object of the verb 'enjoyed')

We enjoyed the cabin's location on the lake. (possessive noun phrase, direct object of the verb 'enjoyed')

We planned a party for the birthday of my mother. (noun phrase, object of the preposition 'for')

We planned a party for my mother's birthday. (possessive noun phrase, object of the preposition'for')