1. The actor who acted in the film " Crazy Coconut " won are Oscar.
⇒The actor acting in the film "Crazy Coconut"won the Oscar.
2. The old man who is going for a walk in the park is my stepfather with his dog.
⇒The old man going for a walk in the park is my stepmother with his dog.
3. The worker who was seriously sick is in the hospital now.
⇒The worker being seriously sick is in the hospital now.
4. The poems which were written by Han Mac Tu are my cousin favourite poems
⇒The poems written by Han Mac Tu are my cousin favourite poems
5. The song composer who gave me a surprising gift last night is a famous musician.
⇒The song composer giving me a surprising gift last night is a famous musician