There is a possibility that unknown lifeforms exist on this planet.

His grandfather fought in the Second World War.

He told a sexual joke and made everyone laugh.

The charm of his novel is its unique worldview.

His worldview is very unique, always providing a new perspective.

Sexual abuse is an act that is absolutely not allowed.

Tridymite is a mineral that is formed at high temperatures.

The World Bank is an international institution that supports economic development around the world.

He couldn't escape from the pursuer.

He is an expert in petrochemistry.