Two workers prepping some form of dough used for cooking.
some dough is being prepped by workers.
"Dough is being prepped" is a rephrasing of prepping some form of dough.
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_prep(e2) & of(x2,x3) & for(e1,x5) & n_cooking(x5) & Theme(e1,x4) & v_use(e1) & (x3 = x4) & n_dough(x3) & n_form(x2) & n_worker(x1) & card_eq_2(x1))
exists e1 x1 x2.(Actor(e1,x2) & n_worker(x2) & Theme(e1,x1) & v_prep(e1) & n_dough(x1))