His checked bag was screened for explosives and then loaded on the plane.
( ( His ( checked bag ) ) ( ( was ( ( ( screened ( for explosives ) ) and ) ( then ( loaded ( on ( the plane ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ His) (JJ checked) (NN bag)) (VP (VBD was) (VP (VP (VBN screened) (PP (IN for) (NP (NNS explosives)))) (CC and) (VP (ADVP (RB then)) (VBN loaded) (PP (IN on) (NP (DT the) (NN plane)))))) (. .)))
They didn't load his bag on the plane after screening it for explosives.
( They ( ( ( did n't ) ( ( ( load ( his bag ) ) ( on ( the plane ) ) ) ( after ( ( screening it ) ( for explosives ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD did) (RB n't) (VP (VB load) (NP (PRP$ his) (NN bag)) (PP (IN on) (NP (DT the) (NN plane))) (PP (IN after) (S (VP (VBG screening) (NP (PRP it)) (PP (IN for) (NP (NNS explosives)))))))) (. .)))