Shared Images

I have a facebook page for my work and to get some more flow to it where crated a image that if they shared it they have a chance to win something.
But the problem is how do i find out all the names of people who has shared it.
If i go to insight and look for the image it says its beens shared 8 times how do i find out who they are as they not all showing up on the image
Hope you understand what i mean

Thanks

 

It was not meant to be great info,

Am need to find out how i find the names to everyone who shares the image as its upto 12 but i only can see 7 names

 

anyone mange to help

 

you can take a solve from a facebook master.

 

Must be a easy way to find out the names thats shared it.

 

Explain more.

 

When a image is post on the facebook wall, there are three options are shone bellow that post. There will see the number of shere.Other ways click on the image and will go another page. There will see the number of sheres.

 

I no its shows me the number of shares, as it says in my posts i need to know the names of shared people, But when i click on the number of shares it does not show them all people only some

 

Some people have privacy settings that stop you from seeing it, I done it recently and asked people to share and also comment "Done" underneath.