how eliminate formatting on image

Hello guys,

I am using a twentyfourteen child theme. I know this is easy, but I cannot figure it out. If you scroll down under my grid, you will see a large image in my content. Its an image of a woman watching an airplane. I want to take the formatting off of this one image only, but I don’t know how. I cannot find the image idea and cannot figure out how to get it done in css.

Any help would be much appreciated.

https://www.jimmyesl.com