Mother was treated with magnesium sulfate.
 The mother received no medication
(ROOT (S (NP (NN Mother)) (VP (VBD was) (VP (VBN treated) (PP (IN with) (NP (NN magnesium) (NN sulfate))))) (. .)))
(ROOT (S (NP (DT The) (NN mother)) (VP (VBD received) (NP (DT no) (NN medication)))))
( Mother ( ( was ( treated ( with ( magnesium sulfate ) ) ) ) . ) )
( ( The mother ) ( received ( no medication ) ) )