Two men barbecuing at a beach.
Two men and swimming at the beach.
Barbecuing and swimming are not able to be done simultaneously.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_beach(x3) & Actor(e1,x2) & v_barbecue(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists s1 x1 x2 x3.(n_beach(x3) & a_topic(s1) & subset_of(x2,s1) & at(x2,x3) & n_swimming(x2) & subset_of(x1,s1) & n_man(x1) & card_eq_2(x1))