Premodifier: length
Head noun: contraction

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

Broader concepts

labelprovenanceconfidence
special relativityisap:3128496700.747262
effectisap:1448250170.689794
thingisap:4157510170.647837
phenomenonisap:3126199750.462037

Narrower concepts

labelprovenanceconfidence