Where will you find Laurel and Hardy Marlon Brando Karl Marx together?

This is a riddle! Here's how to solve it:

* Think about what these names represent:

* Laurel and Hardy: A famous comedic duo

* Marlon Brando: A legendary actor known for serious roles

* Karl Marx: A philosopher and political theorist

* Consider where these things might be found:

* A library: It has books about comedy, acting, and philosophy.

So the answer is: In a library.