A firefighter responding to a car fire.
The fire was caused by a meth lab.
The fire could be unrelated to a meth lab.
exists e1 x1 x2 x3 x4.(a_topic(x1) & to(e1,x3) & n_fire(x3) & of(x3,x4) & n_car(x4) & Actor(e1,x2) & v_respond(e1) & (x1 = x2) & n_firefighter(x1))
exists e1 x1 x2 x3.(n_fire(x1) & Actor(e1,x2) & n_lab(x2) & of(x2,x3) & n_meth(x3) & Theme(e1,x1) & v_cause(e1))