A man showing his muscles.
The bodybuilder works out at the gym.
Not every man with  muscles is a bodybuilder.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_show(e1) & n_muscle(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_gym(x2) & n_bodybuilder(x1) & at(e1,x2) & a_out(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))