is why anybody picked it up . 
(ROOT (S (VP (VBZ is) (SBAR (WHADVP (WRB why)) (S (NP (NN anybody)) (VP (VBD picked) (NP (PRP it)) (PRT (RP up)))))) (. .)))
(ROOT (S (VP (VBZ ) (SBAR (WHADVP (WRB )) (S (NP (NN )) (VP (VBD ) (NP (PRP )) (PRT (RP )))))) (. )))