Casein is a major protein found in dairy products.

The wind is blowing strongly.

Wind power is one of the renewable energies.

His music has a unique style.

I found a swing in the park.

I need to take a cold medicine.

I drank a cold medicine and cured my cold.

I caught a cold.

In 1918, the Spanish flu spread all over the world, and many people died.

The government is considering taxing carbon emissions as a new source of revenue.