How do you rewrite expressions in the possessive case?

Examples of noun phrases written in possessive form:

• the skin of the Apple = the Apple's skin
• the bicycle belonging to the boy = the boy'sbicycle
• the playground for the children = the children's playground
• the end of the day = the day's end
• the names of my friends = my friends'names
• the scent of the gardenia = the gardenia'sscent
• the strings of the harp = the harp'sstings
• the history of Ireland = Ireland'shistory
• a journal of the journey = the journey'sjournal
• the ring for the keys = the keys' ring
• property belonging to the landlord = the landlord's property
• the gift for my mother = my mother's gift
• the houses of my neighbors = my neighbors'houses
• the date of the opening = the opening'sdate
• the opinion of one person = one person'sopinion
• the answer to the question = the question'sanswer