We went to see a coral reef during summer vacation.

Coral reefs play a very important role in the marine ecosystem.

I will attend a friend's luncheon party tomorrow.

His behavior was my miscalculation.

He made a miscalculation in the budget.

My favorite starter Pokémon are Bulbasaur, Charmander, and Squirtle.

When is your trip to Santiago?

Nitrous oxide can be used for anesthesia and to boost engine power.

He is camping in the mountains.

The thirteenth day of the month is my birthday.