A man and a girl sit on the ground and eat.
A man and a girl sit and eat.
To sit on the ground and eat is the same as sit and eat.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_ground(x4) & Actor(e2,x5) & v_eat(e2) & subset_of(x7,x5) & n_girl(x7) & subset_of(x6,x5) & n_man(x6) & on(e1,x4) & Actor(e1,x1) & v_sit(e1) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 e2 x1 x2 x3 x4 x5 x6.(Actor(e2,x4) & v_eat(e2) & subset_of(x6,x4) & n_girl(x6) & subset_of(x5,x4) & n_man(x5) & Actor(e1,x1) & v_sit(e1) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_man(x2))