( ( Describe ( how ( ( your ( simple machine ) ) ( is ( used ( to ( make ( work easier ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describe) (SBAR (WHADVP (WRB how)) (S (NP (PRP$ your) (JJ simple) (NN machine)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB make) (S (NP (NN work)) (ADJP (RBR easier))))))))))) (. .)))
Describe how your simple machine is used to make work easier.
(ROOT (S (S (NP (DT A) (JJ complex) (NN machine)) (VP (VBZ is) (VP (VBN described) (PP (IN by))))) (: :) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (QP (JJR more) (IN than) (CD one)) (JJ simple) (NN machine)))))) (. .)))
A complex machine is described by: it is made of more than one simple machine.