A man wearing a glove and grinding a piece of metal.
A young man grinding a piece of metal
Wearing a glove and grinding something indicates one is grinding.
exists e1 e2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e2,x5) & Actor(e2,x4) & v_grind(e2) & of(x5,x6) & n_metal(x6) & n_piece(x5) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glove(x3) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & of(x3,x4) & n_metal(x4) & n_piece(x3) & (x1 = x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))