A child is looking at an exhibit.
A child is eating watermelon in the grass.
one child is looking at an exhibit while the other is eating watermelon
exists e1 x1 x2.(at(e1,x2) & n_exhibit(x2) & Actor(e1,x1) & v_look(e1) & n_child(x1))
exists e1 x1 x2 x3.(n_grass(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_watermelon(x2) & n_child(x1))