His opinion is irrelevant to this issue.

He is an expert in international relations.

In Marxism, it is said that the relations of production form the foundation of society.

He and I are related by blood.

There is a complex love triangle between them.

The police only informed the authorized persons about the information related to the incident.

There are many interests involved in this project.

This is the book that I am reading.

His claim does not match the actual relationship.

In physics, momentum is defined as the product of the mass and velocity of an object.