A seemingly random set of deaths occurred, but these deaths were not normal.

A very diverse set of wildlife occurs in the area, both native and migratory.

This set in motion a chain of events that almost led to the engines being produced much sooner than actually occurred.

The next set of presidential elections will occur in 2010.

This fanciful set of conjectures does not occur all at once, of course.

And as he did, a second set of thoughts occurred to him, no more comforting than the first.

Typically, the set occurs at one trick more than is actually necessary to break the bidding team's contract.

The first set of incidents occurred in the 1960s.

Only a small set of consonants occur between vowels within roots.

The second set occurred some unspecified time later.