The existence of the filaments poses a problem.

Their continued existence poses a serious threat to lasting expansion - and yet, puncturing them raises the grave risk of deflation.

The very existence of this festival has posed a challenge to the entertainment industry, but on an artistic level Lilith has sometimes felt safe.

Velayudan's existence poses a problem to all the members of the joint family.

This Web-only existence, though, posed a problem when he decided to collect his work into a book last year.

The existence of the color phi phenomenon poses an interesting philosophical problem.

Training told him he should report the existence of these supramortals, that their existence could pose a threat.

Their existence now poses an obstacle to serious campaign finance reform.

For my misdeeds, they have given me the burden of solving the enigma your existence poses.

Her existence poses too much of a threat.