What?

Noun:   something or an item
(pronoun., a., & adv.) As an interrogative pronoun, used in asking questions regarding either persons or things; as, what is this? what did you say? what poem is this? what child is lost?

All in one several contain

with mixture of things,

We know not what,

But love to know how

And makes what,

Each this is that.

When we find ‘what’

Someone say “that!"