( ( ( The climate ) ( of ( the ( boreal forest ) ) ) ) ( ( is ( characterised ( by ( ( ( ( long ( , ( extremely ( cold , ) ) ) ) ( dry winters ) ) and ) ( ( short ( , ( cool ( , moist ) ) ) ) summers ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN climate)) (PP (IN of) (NP (DT the) (JJ boreal) (NN forest)))) (VP (VBZ is) (VP (VBN characterised) (PP (IN by) (NP (NP (ADJP (JJ long) (, ,) (RB extremely) (JJ cold) (, ,)) (JJ dry) (NNS winters)) (CC and) (NP (ADJP (JJ short) (, ,) (JJ cool) (, ,) (JJ moist)) (NNS summers)))))) (. .)))
The climate of the boreal forest is characterised by long, extremely cold, dry winters and short, cool, moist summers.
(ROOT (S (S (VP (VBN Exemplified) (PP (IN by) (NP (NN canada) (CC and) (NN alaska))))) (, ,) (NP (DT a) (JJ subarctic) (NN climate)) (VP (VBZ has) (NP (NP (JJ cool) (, ,) (JJ short) (NNS summers)) (CC and) (ADVP (RB long)) (, ,) (NP (JJ cold) (NNS winters)) (, ,) (NP (JJ little) (NN precipitation)) (, ,) (CC and) (NP (JJ abundant) (NNS conifers)))) (. .)))