A bartender wearing a hat is pouring a drink.
A customer is waiting for his martini to be made.
Not all bartenders have a current customer, and not every mixed drink is a martini.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_pour(e2) & n_drink(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & (x1 = x2) & n_bartender(x1))
exists e1 p1 x1 x2.(for(e1,x2) & Topic(x2,p1) & exists e2.(Theme(e2,x2) & v_make(e2)) & n_martini(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_wait(e1) & n_customer(x1))