Reflections from the firemen's uniforms.
Fireman are visisble due to the reflective gear they wear.
The fireman is not necessarily visisble because of the reflections.
exists x1 x2 x3.(n_uniform(x3) & of(x3,x2) & n_fireman(x2) & a_topic(x1) & from(x1,x3) & n_reflection(x1))
exists e1 s1 s2 x1 x2 x3.(n_thing(x2) & n_gear(x2) & a_reflective(s2) & Theme(s2,x2) & r_visisble(s1) & to(s1,x2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & (x2 = x3) & Theme(s1,x1) & a_due(s1) & n_fireman(x1))