The saber-toothed tiger is a type of extinct mammal.

My blood sugar level is within the normal range.

He said he wanted to go to America.

He is operating a restaurant as a side business while working his main job.

He strongly asserted his position on the protection of the constitution.

Cirrus clouds were spread across the sky, creating a beautiful scenery.

His behavior like a mad dog scared the people around him.

The onlookers raised their voices in surprise.

He checks the threads on Kenmo every day.

Category theory is a branch of mathematics that studies structures and their relationships.