Showcase Logo

I have four sliders on one page. The top slider has one logo. I want to showcase that logo and center it in the middle of the slider. How do I isolate the one out of 4 sliders? nth-child? first-child targets all of the first list items and I don’t want that.

Please advise.

http://michiganhr.org/sponsors ( below the fold )

https://wordpress.org/plugins/easy-logo-slider/