( ( ( The ( best estimate ) ) ( of coldness ) ) ( ( ( is ( windchill temperature ) ) ( as ( this ( combines ( ( the effect ) ( of ( ( temperature and ) wind ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJS best) (NN estimate)) (PP (IN of) (NP (NNS coldness)))) (VP (VBZ is) (NP (JJ windchill) (NN temperature)) (SBAR (IN as) (S (NP (DT this)) (VP (VBZ combines) (NP (NP (DT the) (NN effect)) (PP (IN of) (NP (NN temperature) (CC and) (NN wind)))))))) (. .)))
The best estimate of coldness is windchill temperature as this combines the effect of temperature and wind.
(ROOT (S (NP (NNP Windchill)) (VP (VBZ describes) (SBAR (WHNP (WP what)) (S (NP (DT the) (NN temperature)) (VP (VBZ feels) (PP (IN like) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN wind)) (VP (VBZ is) (VP (VBN taken) (PP (IN into) (NP (NN account)))))))))))) (. .)))