( ( ( ( ( Shape ice ) ( into ( a ( convex circle ) ) ) ) and ) ( ( use it ) ( like ( a ( magnifying ( lens ( to ( make fire ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VP (VB Shape) (NP (NN ice)) (PP (IN into) (NP (DT a) (NN convex) (NN circle)))) (CC and) (VP (VB use) (NP (PRP it)) (PP (IN like) (NP (DT a) (VBG magnifying) (NN lens) (S (VP (TO to) (VP (VB make) (NP (NN fire))))))))) (. .)))
Shape ice into a convex circle and use it like a magnifying lens to make fire.
(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.