Two large seagulls are in the water.
There are four large seagulls in the water.
There is no way to know that there are four seagulls in the water, as there is no indication there are any more than the two observed.
exists p1 s1 x1 x2.(n_water(x2) & in(x1,x2) & n_seagull(x1) & a_large(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1 x2.(n_water(x2) & in(p1,x2) & exists s1 x3.((x1 = x3) & n_seagull(x3) & a_large(s1) & Theme(s1,x3) & card_eq_4(x3)))