I'd say work about basic sexual desire is an extremely challenging area for artists to explore.

However, in practice, the matching is an essential and extremely challenging issue in computer vision.

One-pocket, an extremely challenging game in which each player must make all shots into a single pocket.

That's going to make it extremely challenging," he said.

"It's extremely challenging because you work against yourself."

"I find it fascinating, extremely challenging, a very creative undertaking."

The team found implementing such a storyline into an action game to be extremely challenging and considered dropping it during development.

It was simply our misfortune to have had him in office in an extremely challenging time.

It was extremely challenging and the patrols were exhilarating in a positive sense.

This is an extremely challenging task for the party.