Two men playing rugby collide.
The men are racing motorcycles.
The two men cannot be simultaneously playing rugby and racing motorcycles
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_collide(x3) & a_rugby(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_race(e1) & n_motorcycle(x2))