Premodifier: yolk
Head noun: sac

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

Broader concepts

labelprovenanceconfidence
extraembryonic tissueisap:2117995780.718968
good signisap:2464421310.497316
tissueisap:2117995820.409135

Narrower concepts

labelprovenanceconfidence
babyisap:1274954060.200158
u/sisap:2797419050.198977