Daniel took it upon himself to explain a few things.
( Daniel ( ( ( ( took it ) ( upon himself ) ) ( to ( explain ( a ( few things ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Daniel)) (VP (VBD took) (NP (PRP it)) (PP (IN upon) (NP (PRP himself))) (S (VP (TO to) (VP (VB explain) (NP (DT a) (JJ few) (NNS things)))))) (. .)))
Daniel explained why the group was doing what they were doing.
( Daniel ( ( explained ( why ( ( the group ) ( was ( doing ( what ( they ( were doing ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Daniel)) (VP (VBD explained) (SBAR (WHADVP (WRB why)) (S (NP (DT the) (NN group)) (VP (VBD was) (VP (VBG doing) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBD were) (VP (VBG doing)))))))))) (. .)))