It was about seven or eight feet tall.
( It ( ( was ( ( ( about ( ( seven or ) eight ) ) feet ) tall ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (ADJP (NP (QP (RB about) (CD seven) (CC or) (CD eight)) (NNS feet)) (JJ tall))) (. .)))
It was approximately seven or eight feet tall. 
( It ( ( was ( ( ( approximately ( ( seven or ) eight ) ) feet ) tall ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (ADJP (NP (QP (RB approximately) (CD seven) (CC or) (CD eight)) (NNS feet)) (JJ tall))) (. .)))