The roles all go by different names but they fall into 4 distinct classes:

However, if we look at the remaining 20% of sessions we find that they fall into two classes.

The problems fall into two major classes and a third "inconvenience" class:

The Soviets saw the armored car as falling into two primary classes; light and heavy.

Suffixes fall into three classes according to their behavior.

So all I'll say at this point is that "we" fall into three main classes.

During the post-Islamic period the local dynasties fall into three classes: 1.

Current answers fall into two classes, which might be characterized as minimization and denial.

We can view legislation in the acquisition arena to fall into two classes.

They fall into three main classes differing greatly in influence and respect.