( ( ( ( ( ( Electrical resistance ) ( usually ( decreases ( with ( decreasing temperature ) ) ) ) ) , ) and ) ( ( for ( ( ( certain materials ) , ) ( called superconductors ) ) ) ( , ( it ( ( ( becomes ( extremely low ) ) ( near ( absolute ( zero -LRB- ) ) ) ) -RRB- ) ) ) ) ) . )
(ROOT (S (S (NP (JJ Electrical) (NN resistance)) (ADVP (RB usually)) (VP (VBZ decreases) (PP (IN with) (NP (VBG decreasing) (NN temperature))))) (, ,) (CC and) (S (PP (IN for) (NP (NP (JJ certain) (NNS materials)) (, ,) (NP (VBN called) (NNS superconductors)))) (, ,) (NP (PRP it)) (VP (VBZ becomes) (ADJP (RB extremely) (JJ low)) (PP (IN near) (NP (JJ absolute) (CD zero) (NNS -LRB-))) (-RRB- -RRB-))) (. .)))
Electrical resistance usually decreases with decreasing temperature, and for certain materials, called superconductors, it becomes extremely low near absolute zero ().
(ROOT (S (NP (NNS Superconductors)) (VP (VBP are) (NP (NP (NNS materials)) (PP (IN with) (NP (NP (DT a) (NN resistivity)) (PP (IN of) (NP (CD zero))))))) (. .)))