Human troubles are easily classified into a few main heads.

It's not easily classified within Tai, possibly due to migration.

Neutrino was a type not easily classified and almost never encountered.

His holistic work on suburban and urban life is not easily classified.

The novel is not easily classified by a single genre.

The words yes and no are not easily classified into any of the eight conventional parts of speech.

He was quickly recognized as a major artist, though one who couldn't be easily classified.

As a result, his work is not easily classified.

Ultimately, Robbins' writings containing social issues can not be easily classified.

Manning's books are not easily classified as a part of the feminist canon.