( Students ( ( ( ( study ( ( the shape ) ( of ( a ( convex lens ) ) ) ) ) and ) ( determine ( that ( ( a ( convex lens ) ) ( can ( magnify ( ( the sizes ) ( of ( objects ( viewed ( through it ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Students)) (VP (VP (VB study) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (DT a) (NN convex) (NN lens))))) (CC and) (VP (VB determine) (SBAR (IN that) (S (NP (DT a) (NN convex) (NN lens)) (VP (MD can) (VP (VB magnify) (NP (NP (DT the) (NNS sizes)) (PP (IN of) (NP (NP (NNS objects)) (VP (VBN viewed) (PP (IN through) (NP (PRP it))))))))))))) (. .)))
Students study the shape of a convex lens and determine that a convex lens can magnify the sizes of objects viewed through it.
(ROOT (S (NP (NP (DT The) (NN lens)) (PP (IN of) (NP (DT the) (NN eye)))) (VP (VBZ is) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN convex)) (VP (VB shape)))) (. .)))