He found the research more difficult given his professional duties, urban location, race and, eventually, fame.

Many of these government officials interact regularly in their professional duties.

"Dancers can't really perform their professional duties under the influence of drugs," he said.

In the following year his professional duty brought him into temporary collision with the government.

The doctor has a professional duty to act in the best interests of his patient and to advise accordingly.

"We have a professional and moral duty to act on it," he said.

I discovered the joy of my professional duty to stop and take notes.

The president is barred from executing any other public or professional duty while in office.

Although his professional duties rarely allow him to prove it, he is a fine player.

And I'm not talking now about proper performance of professional duties.