KBP37 is a revision of MIML-RE annotation dataset, provided by Gabor Angeli et al. (2014). They use both the 2010 and 2013 KBP official document collections, as well as a July 2013 dump of Wikipedia as the text corpus for annotation. There are 33811 sentences been annotated. Zhang and Wang made several refinements:

They add direction to the relation names, e.g. 'per:employee_of' is split into 'per:employee of(e1,e2)' and 'per:employee of(e2,e1)'. They also replace 'org:parents' with 'org:subsidiaries' and replace 'org:member of’ with 'org:member`' (by their reverse directions).
They discard low frequency relations such that both directions of each relation occur more than 100 times in the dataset.

KBP37 contains 18 directional relations and an additional 'no_relation' relation, resulting in 37 relation classes.

DFKI-SLT/kbp37

DFKI-SLT/
kbp37