( ( ( ( ( Dew point ) ( is ( ( the temperature ) ( at which ) ) ) ) : ) ( ( ( Water ( vapor condenses ) ) ( into ( a ( liquid Hailstones ) ) ) ) ( are ( ( ( ( formed Water ) ( in ( the ( liquid ( state changes ) ) ) ) ) ( into ( water ( vapor Clouds ) ) ) ) ( produce ( rain 4 ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Dew) (NN point)) (VP (VBZ is) (NP (NP (DT the) (NN temperature)) (WHPP (IN at) (WHNP (WDT which)))))) (: :) (S (NP (NP (NNP Water) (NN vapor) (NNS condenses)) (PP (IN into) (NP (DT a) (JJ liquid) (NNS Hailstones)))) (VP (VBP are) (VP (VBN formed) (NP (NNP Water)) (PP (IN in) (NP (DT the) (JJ liquid) (NN state) (NNS changes))) (PP (IN into) (NP (NN water) (NN vapor) (NNS Clouds))) (S (VP (VB produce) (NP (NN rain) (CD 4))))))) (. .)))
Dew point is the temperature at which: Water vapor condenses into a liquid Hailstones are formed Water in the liquid state changes into water vapor Clouds produce rain 4.
(ROOT (S (NP (NN Rain)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (JJ liquid) (NN water))))) (. .)))