1.the lady in black is a famous writer. you met her at the party last night.
The lady in black, whom you met at the party last night, is a famous writer.
2.the victims of the earthquake need help. they were half-starved for many day.
the victims of the earthquake, who were half-starved for many days, need help.
3.some people stole jewelry. they have now been arrested.
the people who stole jewelry have now been arrested.
4.john is one of my closest friends. i have known him for a very long time.
john, who is one of my closest friends, I have known for a very long time.
5.the women is a nurse. we gave the flowers to her.
the woman, to whom we gave the flowers, is a nurse.
6.the young boy is naughty. he rides an expensive motorbike
the young boy, who rides an expensive motorbike, is naughty.