A girl in a firefighter's uniform looks back and says something.
The girl is talking to someone behind her.
The words looks back implies that she must look behind her, and says something implies talking.
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 e1 x1 x2.(n_female(x1) & n_girl(x1) & to(e1,x2) & behind(x2,x1) & n_person(x2) & Actor(e1,x1) & v_talk(e1))