One of the most difficult things about lecturing to photographers is that most audiences include both experienced professionals and amateurs.

It includes professional ballplayers, amateurs, builders and honorary members who have helped popularize the sport in Canada.

Great detectives include amateurs, private detectives and professional policemen.

Its students range in age from 5 to 65 and include both amateurs and professionals.

Current students include professionals and amateurs.

Its players, who will include advanced amateurs as well as semiprofessionals, will not only make music, he says.

Members include amateurs, professionals, beginners and experts with an interest in microscopes, microscopy or microscope slides.

Apple Hill's student performers range in age from 12 to 90, and include devoted amateurs as well as full-time musicians.

These injuries include both professionals and amateurs.

Members range in age from 13 to 78, and include keen amateurs as well as professional photographers.