( ( ( ( ( ( The top ) ( of ( the mesosphere ) ) ) , ) ( called ( the mesopause ) ) ) , ) ( ( is ( ( the ( coldest part ) ) ( of ( ( ( Earth 's ) atmosphere ) ( with ( temperatures ( averaging ( ( ( about ( minus 130 ) ) ( degrees F ) ) ( -LRB- ( ( ( minus 90 ) C ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN top)) (PP (IN of) (NP (DT the) (NN mesosphere))) (, ,) (VP (VBN called) (NP (DT the) (NN mesopause))) (, ,)) (VP (VBZ is) (NP (NP (DT the) (JJS coldest) (NN part)) (PP (IN of) (NP (NP (NP (NNP Earth) (POS 's)) (NN atmosphere)) (PP (IN with) (NP (NP (NNS temperatures)) (VP (VBG averaging) (NP (NP (QP (RB about) (IN minus) (CD 130)) (NNS degrees) (NN F)) (PRN (-LRB- -LRB-) (NP (QP (IN minus) (CD 90) (CD C))) (-RRB- -RRB-)))))))))) (. .)))
The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere with temperatures averaging about minus 130 degrees F (minus 90 C).
(ROOT (S (NP (DT The) (NN mesopause)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (DT the) (NN mesosphere)))))) (. .)))