( ( ( The ( subarctic climate ) ) ( -LRB- ( ( also ( called ( ( ( subpolar climate ) or ) ( boreal climate ) ) ) ) -RRB- ) ) ) ( ( is ( ( ( ( ( ( ( a climate ) ( characterized ( by ( long ( , ( usually ( very ( cold winters ) ) ) ) ) ) ) ) , ) and ) short ) , ) ( cool ( to ( mild summers ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ subarctic) (NN climate)) (PRN (-LRB- -LRB-) (VP (ADVP (RB also)) (VBN called) (NP (NP (NN subpolar) (NN climate)) (CC or) (NP (JJ boreal) (NN climate)))) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT a) (NN climate)) (VP (VBN characterized) (PP (IN by) (NP (JJ long) (, ,) (RB usually) (RB very) (JJ cold) (NNS winters)))) (, ,) (CC and) (ADVP (JJ short)) (, ,) (ADJP (JJ cool) (PP (TO to) (NP (JJ mild) (NNS summers)))))) (. .)))
The subarctic climate (also called subpolar climate or boreal climate) is a climate characterized by long, usually very cold winters, and short, cool to mild 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)))) (. .)))