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))) (. .)))
At seven in the morning.
( ( ( At seven ) ( in ( the morning ) ) ) . )
(ROOT (NP (NP (QP (IN At) (CD seven))) (PP (IN in) (NP (DT the) (NN morning))) (. .)))