( ( As ( a ( specific example ) ) ) ( , ( it ( ( ( is possible ) ( that ( ( ( the presence ) ( of ( ( ( at least ) one ) ( of ( ( ( the ( more ( massive ( jovian planets ) ) ) ) ( -LRB- ( ( ( ( ( Jupiter , ) Saturn ) , ) ( ( Uranus and ) Neptune ) ) -RRB- ) ) ) ( in ( ( the ( outer part ) ) ( of ( the ( Solar System ) ) ) ) ) ) ) ) ) ) ( ( was ( necessary ( for ( ( the development ) ( of life ) ) ) ) ) ( on Earth ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN As) (NP (DT a) (JJ specific) (NN example))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ possible)) (SBAR (IN that) (S (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NP (QP (IN at) (JJS least) (CD one))) (PP (IN of) (NP (NP (NP (DT the) (JJR more) (JJ massive) (NN jovian) (NNS planets)) (PRN (-LRB- -LRB-) (NP (NNP Jupiter)) (, ,) (NP (NNP Saturn)) (, ,) (NP (NNP Uranus) (CC and) (NNP Neptune)) (-RRB- -RRB-))) (PP (IN in) (NP (NP (DT the) (JJ outer) (NN part)) (PP (IN of) (NP (DT the) (NNP Solar) (NNP System)))))))))) (VP (VBD was) (ADJP (JJ necessary) (PP (IN for) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (NN life)))))) (PP (IN on) (NP (NNP Earth))))))) (. .)))
As  a specific example, it is possible that the presence of at least one of the more massive jovian planets (Jupiter, Saturn, Uranus and Neptune) in the outer part of the Solar System was necessary for the development of life on Earth.
(ROOT (S (NP (NNS Uranus)) (VP (VBZ is) (NP (DT the) (ADJP (JJS least) (JJ massive)) (JJ outer) (NN planet))) (. .)))