As the plane was approaching turbulence, the pilot asked the passengers aboard the plane to fasten their seat belts.

He called out not only to me but also to my dog.

The president called on the people to unite in fighting poverty and disease.

The President appealed to the nation for its cooperation.

The teacher, waving his hand, called to me.

The policeman called attention to the problem of pickpockets.

Tom called to her across the street.

The U.S. is calling for an arms embargo against violators of the treaty.

The labor union called for a strike.

The Meteorological Agency is urging caution.