A girl in a firefighter's uniform looks back and says something.
The person is a firefighter.
Just because A girl in a firefighter's uniform looks back and says something does not mean she is a firefighter.
exists e2 e1 p1 x1 x2 x3 x4 x5 x6 x7.(Theme(e2,x7) & Actor(e2,x4) & v_say(e2) & n_thing(x7) & in(x4,x6) & n_uniform(x6) & of(x6,x5) & n_firefighter(x5) & n_girl(x4) & exists s1.(Theme(s1,x1) & a_back(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1) & in(x1,x3) & n_uniform(x3) & of(x3,x2) & n_firefighter(x2) & n_girl(x1))
exists p1 x1.(n_person(x1) & exists x2.((x1 = x2) & n_firefighter(x2)))