Here's a short story:

Imagine what you could do with a machine that could make things disappear. 

For inspiration, you could read some books. In the books of J.R.R. Tolkein, Bilbo Baggins finds a ring that can make him disappear. Of course, there's also poor Harry Potter, who used his invisibility cloak to hide from danger. 

Now that you've got some ideas, it's time for the hard part: building the cloak. To do that, you have to give up science fiction and turn to real science. An invisibility cloak has to cheat anything or anyone who might be watching. In order to understand how something can be seen, it's important to understand how we see. 

Human beings can only see objects that reflect light waves. These waves enter the eye and are then processed by the brain. However, if an object doesn't reflect light, then the waves don't enter the eye, and the brain doesn't process. So building an invisibility cloak is building something that doesn't reflect light. 

Cummer was part of a team of scientists from Duke University, including David Smith and David Schurig, who built the world's first version of an invisibility cloak. They had been inspired by the work of a British physicist, John Pendry. He in May said that an invisibility cloak was possible and Pendry was not the only one thinking about a disappearing act. At the same time, a Scottish physicist, UIf Leonhardt published a paper on building invisibility equipment. 

"It wasn't easy," says Cummer. "As often happens in science and research, it didn't work very well the first time. That first cloak didn't work like Harry Potter's --- the scientists didn't actually see anything disappear. So the research is still under way. " (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: what are people trying to build?
Guess: an invisibility cloak

Question: who tried to build the first one?
Guess: a team of scientists from Duke

Question: how many in the group?
Guess: Three

Question: were they named in the story?
Guess: Yes

Question: what are the names of two of them?
Guess: David Smith and David Schurig

Question: who's work served as the inspiration for their project?
Guess: Harry Potter

Question: what novelist is mentioned?
Guess: J.R.R. Tolkein

Question: what is the name of one of his characters?
Guess: Bilbo Baggins

Question: what did he find?
Guess: A ring

Now answer the following question in the same format.

Question: did it do anything?

make him disappear