A person in a helmet on a motorcycle
A tall human in a helmet
It cannot be inferred that the person is a tall human.
exists x1 x2 x3.(a_topic(x1) & in(x1,x2) & on(x2,x3) & n_motorcycle(x3) & n_helmet(x2) & n_person(x1))
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_helmet(x2) & n_human(x1) & a_tall(s1) & Theme(s1,x1))