At eight in the morning.
( ( ( At eight ) ( in ( the morning ) ) ) . )
(ROOT (NP (NP (QP (IN At) (CD eight))) (PP (IN in) (NP (DT the) (NN morning))) (. .)))
During the morning at eight.
( ( During ( ( the morning ) ( at eight ) ) ) . )
(ROOT (FRAG (PP (IN During) (NP (NP (DT the) (NN morning)) (PP (IN at) (NP (CD eight))))) (. .)))