I wrote the problem on the blackboard using chalk.

We are planning to go to the science museum this weekend.

I saw a whooper swan in the park.

The story of 'Puss in Boots' is very popular among children.

Cygnus is one of the summer constellations.

In the park, a gray-haired old man was sitting on a bench reading a newspaper.

The bald eagle is a symbolic bird of North America.

His son has a developmental disability, but he is doing his best at a special needs school.

He handled the automatic rifle carefully.

We should reduce our energy consumption.