segmentation: teched 2009
rank.candidate: teched 20 09 tech ed2009 te ched 2009 tec he d 2009 tech ed2 009 te che d 2009 te ched2009 teched 2009 teched 2 00 9 tech ed200 9 tech ed 2009 tech e d20 09 te ch ed 2009 teched 2 009 teche d 2009 tech e d2009 t ech ed 2009 teched 200 9 tech e d200 9 tec hed 2009