( ( From ( four ( to six ) ) ) ( weeks ( ( are ( required ( to ( complete ( the ( entire ( life cycle ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN From) (NP (CD four) (TO to) (CD six))) (NP (NNS weeks)) (VP (VBP are) (VP (VBN required) (S (VP (TO to) (VP (VB complete) (NP (DT the) (JJ entire) (NN life) (NN cycle))))))) (. .)))
From four to six weeks are    required to complete the entire life cycle.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (QP (CD four) (TO to) (CD six)) (NNS weeks)) (SBAR (S (VP (VBP are) (PP (IN in) (NP (NP (DT the) (NN life) (NN cycle)) (PP (IN of) (NP (NNS ladybugs)))))))))) (. .)))