According to their properties, cations are usually classified into six groups.

Listeners to my story can be classified into three groups: 1.

From these, the species can be classified into two main groups.

The nine ways can also be classified into three groups, the:

Most historians have classified the people of the era into three groups.

All current research in this field can be classified into two groups.

Recently, medical researchers have agreed to classify the disorder into two major groups.

These types can be further classified into 5 different groups with relation to their general shape.

Infants were classified by weight into 3 groups: 2 kg.

The schools can be classified into two distinct groups.