About: first class mail

Premodifier: first class
Head noun: mail

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

Broader concepts

label	provenance	confidence
option	isap:304347798	0.457954
means	isap:92853091	0.370003
service	isap:9952205	0.324236
mail	isap:176411904	0.276725
usp	isap:125412391	0.202113

Narrower concepts

label	provenance	confidence
delivery confirmation	isap:408130300	0.657570
letter	isap:497797958	0.381449