I will attend a friend's luncheon party tomorrow.

He ran to third base.

The shrapnel exploded on the battlefield, and the soldiers could not avoid it.

I have been involved in the planning of a new project.

We are actively participating in this project.

This wine has sulfurous acid added to it.

I learned about the reaction of nitrous acid in chemistry class.

He is studying the concept of the 'three talents' in ancient China.

What will you make for supper tonight?

My friend, Santiago, is from Chile.