How to remove specific things from an image ? example inside

[Chris Buttacoli]

You may even do this in photoshop first before bringing it into AE.

[Jm Chadillon]

if you want it to look good, photoshop it cut out the white in photoshop then export as PSD.

OR if you are strapped for time

in PS do a color selection on the yellow paper, adjust so you get your proper selection on the paper and make a new layer from selection, delete BG layer. export as psd and import into AE.