About: polar vortex

Premodifier: polar
Head noun: vortex

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

Broader concepts

label	provenance	confidence
extreme weather	isap:443758424	0.547465
distant memory	isap:388372973	0.543738
arctic cyclone	isap:443859027	0.493563
weather system	isap:392884718	0.484934
thing	isap:117867622	0.459842
event	isap:115325594	0.415192
vortex	isap:385126192	0.407923
storm	isap:113423212	0.394321
term	isap:492585263	0.386014
time	isap:492618427	0.362951
upper atmosphere	isap:18645732	0.359019
weather	isap:443758426	0.320563
phenomenon	isap:17937301	0.311015
winter	isap:387529198	0.169904

Narrower concepts

label	provenance	confidence
harsh winter	isap:389849972	0.339271
winter	isap:389849971	0.147541