Ave Cunctator.
The Cunctator, 18/06/2018 04:46:
If it's pulling from Wikipedia (CC-BY-SA)
It's not, in the sense that it's not getting any copyrightable bits from it.
A relevant document is https://meta.wikimedia.org/wiki/Wikilegal/Database_Rights.
Then just few days ago there was an exhausting discussion in various mailing lists and https://phabricator.wikimedia.org/T193728.
Federico