There is an exhibition of highland dress, showing how it developed through the centuries.
( There ( ( ( ( is ( ( an exhibition ) ( of ( highland dress ) ) ) ) , ) ( showing ( how ( it ( developed ( through ( the centuries ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (DT an) (NN exhibition)) (PP (IN of) (NP (JJ highland) (NN dress)))) (, ,) (S (VP (VBG showing) (SBAR (WHADVP (WRB how)) (S (NP (PRP it)) (VP (VBD developed) (PP (IN through) (NP (DT the) (NNS centuries))))))))) (. .)))
They show how highland dress changed over the years.
( They ( ( show ( how ( ( highland dress ) ( changed ( over ( the years ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP show) (SBAR (WHADVP (WRB how)) (S (NP (JJ highland) (NN dress)) (VP (VBD changed) (PP (IN over) (NP (DT the) (NNS years))))))) (. .)))