( ( In ( ( the construction ) ( of ( his telescope ) ) ) ) ( Galileo ( made ( use ( of ( ( ( ( a convex ) and ) ( a ( concave lens ) ) ) ; ) ) ) ) ) )
(ROOT (S (PP (IN In) (NP (NP (DT the) (NN construction)) (PP (IN of) (NP (PRP$ his) (NN telescope))))) (NP (NNP Galileo)) (VP (VBD made) (NP (NP (NN use)) (PP (IN of) (NP (NP (DT a) (NN convex)) (CC and) (NP (DT a) (JJ concave) (NN lens)) (: ;)))))))
In the construction of his telescope Galileo made use of a convex and a concave lens;
(ROOT (S (NP (DT The) (ADJP (RBS most) (JJ common)) (JJ two-lens) (NN telescope)) (, ,) (PP (IN like) (NP (DT the) (JJ simple) (NN microscope))) (, ,) (VP (VBZ uses) (NP (NN convex) (NNS lenses))) (. .)))