I am planning to go to San Francisco next week.

She gave birth to a baby in the maternity hospital.

My younger brother is good at addition in arithmetic.

This silkworm produces beautiful silk.

We cannot live without oxygen.

The place of production for this wine is France.

The special product of this region is delicious apples.

The pattern of three cold days followed by four warm days continues, doesn't it?

At the school sports festival, we did a three-legged race.

Xanthine is a type of alkaloid, which is found in coffee and tea.