( ( Because ( of ( ( very high ) ( infant mortality ) ) ) ) ( ( -LRB- ( ( ( ( 22 % ) ( of ( new babies ) ) ) died ) -RRB- ) ) ( ( ( the ( life expectancy ) ) ( at birth ) ) ( ( was ( ( ( only 25.0 ) years ) ( in 1900 ) ) ) . ) ) ) )
(ROOT (S (PP (IN Because) (PP (IN of) (NP (ADJP (RB very) (JJ high)) (NN infant) (NN mortality)))) (PRN (-LRB- -LRB-) (S (NP (NP (CD 22) (NN %)) (PP (IN of) (NP (JJ new) (NNS babies)))) (VP (VBD died))) (-RRB- -RRB-)) (NP (NP (DT the) (NN life) (NN expectancy)) (PP (IN at) (NP (NN birth)))) (VP (VBD was) (NP (NP (QP (RB only) (CD 25.0)) (NNS years)) (PP (IN in) (NP (CD 1900))))) (. .)))
Because of very high infant mortality (22% of new babies died) the life expectancy at birth was only 25.0 years in 1900.
(ROOT (S (PP (IN During) (NP (NP (DT the) (JJ first) (NN year)) (PP (IN after) (NP (NN birth))))) (, ,) (NP (DT a) (NN baby)) (VP (VBD called) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN infant))) (. .)))
During the first year after birth, a baby called a(n) infant.