( ( For instance ) ( , ( you ( ( can ( ( shorten ( ( the ( light path ) ) ( in ( Figure 1b ) ) ) ) ( by ( using ( ( a ( concave lens ) ) ( instead ( of ( ( a ( convex lens ) ) ( -LRB- ( ( see figure ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN instance))) (, ,) (NP (PRP you)) (VP (MD can) (VP (VB shorten) (NP (NP (DT the) (JJ light) (NN path)) (PP (IN in) (NP (NN Figure) (NNS 1b)))) (PP (IN by) (S (VP (VBG using) (NP (NP (DT a) (JJ concave) (NN lens)) (PP (RB instead) (IN of) (NP (NP (DT a) (NN convex) (NN lens)) (PRN (-LRB- -LRB-) (S (VP (VB see) (NP (NN figure)))) (-RRB- -RRB-)))))))))) (. .)))
For instance, you can shorten the light path in Figure 1b by using a concave lens instead of a convex lens ( see figure ).
(ROOT (S (NP (JJ Concave) (NNS lenses)) (VP (MD can) (VP (VB correct) (NP (NN myopia)))) (. .)))