Head noun: serfdom

Same concepts
http://dbpedia.org/resource/Serfdom

Narrower concepts

labelprovenanceconfidence
russiaisap:4400853280.169369
slaveryisap:4370953370.155772
peopleisap:4419366930.135436
economicsisap:273019880.115355
countryisap:4343798630.045372