This equation has a singularity.

The main problem with this project is the lack of communication.

This sentence is using nomaten.

A part alternation mark is used in these lyrics.

He likes to take a walk in the park at dusk.

The spectacled caiman is a type of crocodile that lives in Central and South America.

The girl who wears glasses was reading a book in the library.

That plan is too impractical, it's difficult to implement.

His plan was so unrealistic that no one could believe it.

He works at a non-governmental organization.