A group of people stand by a body of water.
Polar bears eating a seal.
Bears and people are different.
exists e1 x1 x2 x3 x4.(by(e1,x3) & of(x3,x4) & n_water(x4) & n_body(x3) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 p1 x1.(ne_nam_polar(x1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_eat(e2) & n_seal(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_bear(e1))