Using a Standard Assets asset in a paid Asset Store Asset for demonstrative Purposes

I know that generally you're not allowed to include material from other sources in your (paid) Asset unless the author of that Material expressly agrees or that material is in the public Domain. (See this question: http://answers.unity3d.com/questions/794239/allowed-to-sell-assets-that-use-free-assets.html) I'm wondering whether Unity Technologies has given that agreement for their free Assets in the Asset Store and the Standard Assets. Note that I'm not trying to resubmit Angry Bots under my own name, the free unity asset would not be a substantial or even important part of my Asset, only for demonstrative Purposes. For example the asset in question could be a fancy shader for blending images and the unity asset some of those robotboy sprites. The asset would include a demo scene in which you could blend between the sprites. Would that be allowed?