This is the first time I've seen this notation.

We need to strengthen our public relations activities.

His release was finally decided.

The police released him.

He is studying in the other room.

The legislation in Japan is very complex.

There is always hot coffee in my thermos.

This library is a treasury of knowledge.

When he hears the sound of the organ gun, he recalls the horrors of war.

The shape of this parabola is beautiful, isn't it?