He liked it a little warmer.
( He ( ( liked ( it ( ( a little ) warmer ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD liked) (S (NP (PRP it)) (ADJP (NP (DT a) (RB little)) (JJR warmer)))) (. .)))
He preferred it at a slightly higher temperature.
( He ( ( ( preferred it ) ( at ( a ( ( slightly higher ) temperature ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD preferred) (NP (PRP it)) (PP (IN at) (NP (DT a) (ADJP (RB slightly) (JJR higher)) (NN temperature)))) (. .)))