Two people sit on a bench at a park.
A man grinds his teeth in his sleep.
There can be either two people or one man.
exists e1 x1 x2 x3.(at(e1,x3) & n_park(x3) & on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_grind(e1) & in(x2,x3) & n_sleep(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & n_tooth(x2) & of(x2,x1) & n_man(x1))