To some minds, the concept has not proved to be a viable business.

These concepts prove that a family has influence on an individual no matter if the influence be good or bad.

This concept has proven to be instrumental in the development of childhood literacy into the current decade.

The concept proved to be a little too far ahead of its time.

But for many, the mere concept of keeping children entertained on the road has proven too good to pass up.

That concept would prove irresistible to a number of people.

The concept proved to be effective and it spread throughout European countries in the 1960s.

Due to a small problem the car did not finish the race, but the concept did prove itself.

The concept has proved its worth in those countries that have adopted it.

This concept immediately proved successful, so all other buildings on the site were torn down in 1894.