( ( the ( dewpoint temperature ) ) ( ( is ( ( the temperature ) ( ( to which ) ( air ( must ( be ( ( ( ( cooled ( -LRB- ( ( at ( a ( given pressure ) ) ) -RRB- ) ) ) ( in order ) ) ( for condensation ) ) ( to ( ( ( occur -LRB- ) ( cloud forms ) ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT the) (NN dewpoint) (NN temperature)) (VP (VBZ is) (NP (NP (DT the) (NN temperature)) (SBAR (WHPP (TO to) (WHNP (WDT which))) (S (NP (NN air)) (VP (MD must) (VP (VB be) (VP (VBN cooled) (PRN (-LRB- -LRB-) (PP (IN at) (NP (DT a) (VBN given) (NN pressure))) (-RRB- -RRB-)) (PP (IN in) (NP (NN order))) (PP (IN for) (NP (NN condensation))) (S (VP (TO to) (VP (VB occur) (-LRB- -LRB-) (NP (NN cloud) (NNS forms)) (-RRB- -RRB-))))))))))) (. .)))
the dewpoint temperature is the temperature to which air must be cooled (at a given pressure) in  order for condensation to occur (cloud forms).
(ROOT (S (NP (NNP Condensation)) (VP (MD must) (VP (VB occur) (PP (IN for) (NP (NNS clouds))) (S (VP (TO to) (VP (VB form)))))) (. .)))