This challenge has only occurred once so far in the series.

The second challenge occurred during the Congress that has now thankfully drawn to a close.

The first challenge occurred in 1955, and the second took place in the early 1980s.

This conclusion is based on little more than that the challenge occurs in the course of a trial.

Very similar sports or challenges like this occur in a number of cultures:

Should legal challenges occur, it would not be the first time the promise of science has collided with state law.

Men are always in competition with each other, even when actual challenges never occur, which means what one or two have, others want.

The real challenge usually occurs with preschoolers or early school-age children who sleep away from home for the first few times without their parents.

That is where the biggest challenge to Section 329 occurred during the 2000 Federal election.

The first widespread challenge to the prevailing medical approach in Western countries occurred in the late 18th century.