About: sunspot number

Premodifier: sunspot
Head noun: number

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

Broader concepts

label	provenance	confidence
solar activity	isap:104026443	0.728108
solar index	isap:114818962	0.606630
indicator	isap:420008757	0.498452
proxy	isap:118553249	0.409006
year	isap:499712218	0.333654

Narrower concepts

label	provenance	confidence