okay and and i think we just hang up i don't think we have to do anything else
( ( ( okay ( ( and and ) i ) ) ( think ( we ( just ( ( hang up ) i ) ) ) ) ) ( ( do n't ) ( think ( we ( have ( to ( do ( anything else ) ) ) ) ) ) ) )
(ROOT (S (NP (NP (NN okay) (CC and) (CC and) (NN i)) (SBAR (S (VP (VBP think) (S (NP (PRP we)) (VP (ADVP (RB just)) (VB hang) (PRT (RP up)) (NP (FW i)))))))) (VP (VBP do) (RB n't) (VP (VB think) (SBAR (S (NP (PRP we)) (VP (VBP have) (S (VP (TO to) (VP (VB do) (S (NP (NN anything)) (ADJP (RB else)))))))))))))
We need to wait until they tell us what to do. 
( We ( ( need ( to ( wait ( until ( they ( tell ( us ( what ( to do ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP need) (S (VP (TO to) (VP (VB wait) (SBAR (IN until) (S (NP (PRP they)) (VP (VBP tell) (NP (NP (PRP us)) (SBAR (WHNP (WP what)) (S (VP (TO to) (VP (VB do))))))))))))) (. .)))