(ROOT (S (NP (PRP I)) (VP (VBP understand) (SBAR (WHADVP (WRB why)) (S (NP (DT no) (NN one) (JJ else)) (VP (VBP bid))))) (. .)))
Sheldon
I understand why no one else bid.
nsubj
Case=Nom|Number=Sing|Person=1|PronType=Prs
I
I
PRON
PRP
root
Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin
understand
understand
VERB
VBP
advmod
PronType=Int
why
why
ADV
WRB
det
no
no
DET
DT
nsubj
Number=Sing|PronType=Neg
one
one
PRON
NN
amod
Degree=Pos
else
else
ADJ
JJ
ccomp
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
bid
bid
VERB
VBP
punct
.
.
PUNCT
.
I understand why no one else bid.