He is the scientist. He invented a robot.
He is the scientis who invented the robot.
I like the town. I was born there.
I like the town where I was born.
This is the painting. Picasso painted it.
This is the painting which Picasso painted.
This is Mrs Gordon. She teaches English.
This is Mrs Gordon who teaches English.
This is a robot. It cleans the floor.
This is a robot which cleans the floor.
Last year I was at the sea. I learnt to swim there.
Last year I was at the sea where I learnt to swim.
Here's the woman. She was his second wife.
Here's the woman who was his second wife.
This is the study. He wrote letters here.
This is the study where he wrote letters.
This is the castle. The king was born here.
This is the castle where the king was born.
This is the crown. He wore it during his reign.
This is the crown which he wore during his reign.
