A swimmer wearing a black cap surfaces for air.
a swimmer wears a black cap
wears and wearing means the swimmer has whatever it is on, the same thing
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & for(x3,x5) & n_air(x5) & n_surface(x3) & of(x3,x4) & n_cap(x4) & a_black(s1) & Theme(s1,x3) & (x1 = x2) & n_swimmer(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_cap(x2) & a_black(s1) & Theme(s1,x2) & n_swimmer(x1))