( ( ( ( concave and ) convex ) ( ( mirrors and ) lenses ) ) ; )
(ROOT (S (VP (VB concave) (CC and) (VB convex) (NP (NNS mirrors) (CC and) (NNS lenses))) (: ;)))
concave and convex mirrors and lenses;
(ROOT (S (NP (DT A) (NN convex) (NN mirror)) (VP (VBZ is) (VP (VBN shaped) (PP (IN like) (NP (NP (DT the) (NN outside)) (PP (IN of) (NP (DT a) (NN bowl))))))) (. .)))
A convex mirror is shaped like the outside of a bowl.