um-hum what is your worst then
( um-hum ( what ( ( is ( your worst ) ) then ) ) )
(ROOT (FRAG (NP (NN um-hum)) (SBAR (WHNP (WP what)) (S (VP (VBZ is) (NP (PRP$ your) (JJS worst)) (ADVP (RB then)))))))
What is your worst memory?
( What ( ( is ( your ( worst memory ) ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VP (VBZ is) (NP (PRP$ your) (JJS worst) (NN memory)))) (. ?)))