( 2.5.3 ( ( identify ( ( the ( physical properties ) ) ( of ( minerals ( -LRB- ( ( ( e.g. , ) ( color ( , ( hardness ( , ( luster ( , ( and streak ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD 2.5.3)) (VP (VBP identify) (NP (NP (DT the) (JJ physical) (NNS properties)) (PP (IN of) (NP (NP (NNS minerals)) (PRN (-LRB- -LRB-) (NP (NP (NNP e.g.)) (, ,) (NP (NN color) (, ,) (NN hardness) (, ,) (NN luster) (, ,) (CC and) (NN streak))) (-RRB- -RRB-)))))) (. .)))
2.5.3 identify the physical properties of minerals (e.g., color, hardness, luster, and streak).
(ROOT (S (SBAR (IN Although) (S (NP (PRP it)) (VP (VBZ is) (NP (DT the) (JJS easiest) (S (VP (TO to) (VP (VB observe)))))))) (, ,) (NP (NN color)) (VP (VBZ is) (RB not) (ADJP (JJ ideal) (PP (IN as) (NP (DT a) (JJ sole) (NN way)))) (S (VP (TO to) (VP (VB identify) (NP (NNS minerals)))))) (. .)))