 Afterwards, the Bishop walked among the crowds, eating their picnic lunches. 
( Afterwards ( , ( ( the Bishop ) ( ( ( ( walked ( among ( the crowds ) ) ) , ) ( eating ( their ( picnic lunches ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Afterwards)) (, ,) (NP (DT the) (NNP Bishop)) (VP (VBD walked) (PP (IN among) (NP (DT the) (NNS crowds))) (, ,) (S (VP (VBG eating) (NP (PRP$ their) (NN picnic) (NNS lunches))))) (. .)))
The Bishop likes walking among crowds while they eat.
( ( The Bishop ) ( ( likes ( ( walking ( among crowds ) ) ( while ( they eat ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Bishop)) (VP (VBZ likes) (S (VP (VBG walking) (PP (IN among) (NP (NNS crowds))) (SBAR (IN while) (S (NP (PRP they)) (VP (VBP eat))))))) (. .)))