rarely seem sure of where it should go 
(ROOT (S (ADVP (RB rarely)) (VP (VBP seem) (S (ADJP (JJ sure) (PP (IN of) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (MD should) (VP (VB go)))))))))))
(ROOT (S (ADVP (RB )) (VP (VBP ) (S (ADJP (JJ ) (PP (IN ) (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (MD ) (VP (VB )))))))))))