This extension has been undeployed and archived. Two years later, any data in its tables has lost any meaningfulness.
So far, I've found it on enwiki, testwiki and wikidata:
[enwiki]> show tables like 'wikigrok%'; +------------------------------+ | Tables_in_enwiki (wikigrok%) | +------------------------------+ | wikigrok_claims | | wikigrok_questions | | wikigrok_responses | +------------------------------+ 3 rows in set (0.00 sec) [wikidatawiki]> show tables like 'wikigrok%'; +------------------------------------+ | Tables_in_wikidatawiki (wikigrok%) | +------------------------------------+ | wikigrok_claims | | wikigrok_responses | +------------------------------------+ [testwiki]> show tables like 'wikigrok%'; +--------------------------------+ | Tables_in_testwiki (wikigrok%) | +--------------------------------+ | wikigrok_questions | +--------------------------------+
Data size:
[enwiki]> select count(*) from wikigrok_questions; +----------+ | count(*) | +----------+ | 334918 | +----------+ [wikidatawiki]> select count(*) from wikigrok_claims union select count(*) from wikigrok_responses; +----------+ | count(*) | +----------+ | 3333 | | 2672 | +----------+ [testwiki]> select count(*) from wikigrok_questions; +----------+ | count(*) | +----------+ | 1 | +----------+ 1 row in set (0.24 sec)