( ( 1.4.9-6 Explain ) ( ( how ( ( a ( compound machine ) ) ( is ( made ( from ( simple machines ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP 1.4.9-6) (NNP Explain)) (SBAR (WHADVP (WRB how)) (S (NP (DT a) (JJ compound) (NN machine)) (VP (VBZ is) (VP (VBN made) (PP (IN from) (NP (JJ simple) (NNS machines))))))) (. .)))
1.4.9-6 Explain how a compound machine is made from simple machines.
(ROOT (S (NP (NNS Scissors)) (VP (VBP are) (NP (JJ compound) (NNS machines))) (. .)))