Semantic web vs big data / ML

Can someone please fill me in on the latest state of play between the symantec web and using machine learning techniques with massive unstructured datasets to derive probablistic links between data items. Are the two techniques in competition? Are they compatible? Or is it more a case of horses for courses? I refer to this 2009 paper https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/35179.pdf The Unreasonable Effectiveness of Data by Norvig et al.
Thanks for any pointers


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