you know and then how long are they supposed to take it
( you ( ( know and ) ( then ( ( how long ) ( are ( they ( supposed ( to ( take it ) ) ) ) ) ) ) ) )
(ROOT (S (NP (PRP you)) (VP (VP (VBP know)) (CC and) (VP (ADVP (RB then)) (SBAR (WHNP (WRB how) (RB long)) (S (VP (VBP are) (NP (NP (PRP they)) (VP (VBN supposed) (S (VP (TO to) (VP (VB take) (NP (PRP it))))))))))))))
You don't know the length of time they're supposed to take the medication.
( ( You ( ( do n't ) ( know ( ( the length ) ( of time ) ) ) ) ) ( they ( ( 're ( supposed ( to ( take ( the medication ) ) ) ) ) . ) ) )
(ROOT (S (S (NP (PRP You)) (VP (VBP do) (RB n't) (VP (VB know) (NP (NP (DT the) (NN length)) (PP (IN of) (NP (NN time))))))) (NP (PRP they)) (VP (VBP 're) (VP (VBN supposed) (S (VP (TO to) (VP (VB take) (NP (DT the) (NN medication))))))) (. .)))