A man rides his dirt bike.
A person jogging around the park
The man can either ride his dirt bike or go jogging, he cannot do both at the same time.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & of(x2,x1) & n_male(x1) & n_man(x1))
exists e1 x1 x2 x3.(n_park(x3) & a_topic(x1) & around(e1,x3) & Actor(e1,x2) & v_jog(e1) & (x1 = x2) & n_person(x1))