He is known as the highest leader of the organization.

He is an expert in brooding, always looking for the best ways to maintain the health of chickens.

He built a coop to brood chickens.

He is good at remembering consecutive numbers.

I have five pencils.

Chamaeleon is one of the constellations in the southern hemisphere.

Heavy hydrogen is one of the isotopes of hydrogen.

She is interested in numerology.

I can fall asleep immediately after taking a sleeping pill.

He is majoring in applied mathematics at university.