Premodifier: ground
Head noun: breaking

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

Broader concepts

labelprovenanceconfidence
eventisap:3601248280.529878
anythingisap:617591330.240778
noneisap:3829153660.225190

Narrower concepts

labelprovenanceconfidence
yearisap:4606621460.202963