Bob ran down the road.
He fell over.

Bob, who ran down the road, fell.

The thunder roared.
The hobbits hid.

As the thunder roared, the Hobbits hid.

Bilbo slept in a cave.
The goblins attacked.

The goblins attacked Bilbo, who was sleeping In a cave.

The cart came to a wheezing halt.
Gandalf strode into the hobbit hole.

After the cart came to a wheezing halt, Gandalf strode into the hobbit hole.

Jim was interested in the idea.
He rang his friend.

Jim, who was interested in the idea, rang his friend.

Owls are nocturnal.
This means they are active at night.
They have excellent eyesight.

Owls, which have excellent eyesight, are nocturnal and this means they are active at night.

Ronaldo scored a goal.

The crowd went wild.