Google has been building her knowledge graph for a couple of years. The goal is for computer to truly understand real world concepts rather than keywords and text. I didn't fully understand the application of it rather than some fancy cards on the search results page until yesterday when I asked Google "where did Golden retriever originate?", and Google answered "England". Google might not really understand the concept originated or golden retriever, but Google understands that "where" is asking for a place and she found a lot of mention of "England" in all the page results of "golden retrieve origin", she also understand that England is a place. So Google guessed the answer.

The Google computer has been reading about these concepts for years, now we know it can see them in pictures (and maybe even in live videos). That excites me to a degree that it becomes a little bit scary. When will that computer learn the concept of "self"?

Update: actually Google seems to understand the concept of "golden retriever", I search my photos with the word and yes, at least Google knows how golden retrievers look like.