On the platform stood an altar and a large stone pillar.
( ( On ( the platform ) ) ( ( stood ( ( ( an altar ) and ) ( a ( large ( stone pillar ) ) ) ) ) . ) )
(ROOT (S (PP (IN On) (NP (DT the) (NN platform))) (VP (VBD stood)) (NP (NP (DT an) (NN altar)) (CC and) (NP (DT a) (JJ large) (NN stone) (NN pillar))) (. .)))
There was only a pillar on the platform.
( There ( ( ( was only ) ( ( a pillar ) ( on ( the platform ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (ADVP (RB only)) (NP (NP (DT a) (NN pillar)) (PP (IN on) (NP (DT the) (NN platform))))) (. .)))