( ( If ( ( the ( external pressure ) ) ( ( ( drops ( to zero ) ) , ) ( at ( ( a ( blood pressure ) ) ( of ( 75 Torr ) ) ) ) ) ) ) ( ( ( the ( boiling point ) ) ( of water ) ) ( ( is ( ( ( 46 degrees ) Celsius ) ( -LRB- ( ( 115 F ) -RRB- ) ) ) ) . ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (JJ external) (NN pressure)) (VP (VBZ drops) (PP (TO to) (NP (CD zero))) (, ,) (PP (IN at) (NP (NP (DT a) (NN blood) (NN pressure)) (PP (IN of) (NP (CD 75) (NN Torr)))))))) (NP (NP (DT the) (JJ boiling) (NN point)) (PP (IN of) (NP (NN water)))) (VP (VBZ is) (NP (NP (NP (CD 46) (NNS degrees)) (NNPS Celsius)) (PRN (-LRB- -LRB-) (NP (QP (CD 115) (CD F))) (-RRB- -RRB-)))) (. .)))
If the external pressure drops to zero, at a blood pressure of 75 Torr the boiling point of water is 46 degrees Celsius (115 F).
(ROOT (S (PP (IN In) (NP (NNS celsius))) (, ,) (NP (NP (DT the) (JJ boiling) (NN point)) (PP (IN of) (NP (NN water)))) (VP (VBZ is) (NP (QP (CD one) (CD hundred)) (NNS degrees))) (. .)))