A dedicated worker working on his craft shirtless.
Someone not wearing a shirt is performing a task.
Someone who is shirtless is not wearing a shirt and working implies performing a task.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_shirtless(x3) & of(x3,x4) & n_craft(x4) & of(x3,x1) & n_male(x1) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_worker(x1) & a_dedicated(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & n_task(x3) & -exists e2 x4.(Theme(e2,x4) & Actor(e2,x2) & v_wear(e2) & n_shirt(x4)) & (x1 = x2) & n_person(x1))