A small brown bird eats on grass.
The brown bird is eating.
A brown bird eating can be inferred.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_grass(x3) & Actor(e1,x1) & v_eat(e1) & n_bird(x1) & of(x1,x2) & n_brown(x2) & a_small(s1) & Theme(s1,x1))
exists e1 s1 x1.(n_bird(x1) & a_brown(s1) & Theme(s1,x1) & Actor(e1,x1) & v_eat(e1))