Apple acquires Lattice, an A.I company specializing in 'dark data'

Lattice [1] originated as DeepDive [2][3], a statistical inference project led by Christopher Ré at Stanford.

[1]: https://lattice.io/

[2]: http://deepdive.stanford.edu/showcase/apps

[3]: https://github.com/HazyResearch/deepdive

DeepDive was discussed previously on Hacker News [4].

[4]: https://news.ycombinator.com/item?id=8736739

Does anyone have a nice specific example or application if dark data. Im not really understanding what the mean by unstructured data.