It does present a challenge to industry, government and individual workers.
As such these foods present a challenge to those who have a professional interest in food.
The confrontation may present a new challenge to the Government.
Plus, boys present a different challenge, one that I like.
The first years of 21st century have also presented challenges.
The event seems certain to present a fresh challenge to the government, if only on a small scale.
School can also present a particular challenge for a child with type 1 diabetes.
And that, he said, presents a particularly difficult challenge for the Bush administration.
It does of course present a challenge to the underlying information and technology system.
The management of context in natural language understanding can present special challenges.