A man cutting steel while wearing noise canceling earmuffs.
a man is working on his hobby
The fact a man is cutting steal doesn't necessarily indicate this is his hobby.
exists e2 e3 e1 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e3) & Theme(e3,x4) & Actor(e3,x2) & v_wear(e3) & n_earmuff(x4) & Actor(e2,x4) & v_cancel(e2) & of(x4,x5) & n_noise(x5) & Theme(e1,x3) & Actor(e1,x2) & v_cut(e1) & n_steel(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_hobby(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_work(e1) & n_man(x1))