Two muddy boys swim.
There are two boys.
"There are two boys." is an observation of "Two muddy boys swim."
exists e1 s1 x1.(Actor(e1,x1) & v_swim(e1) & n_boy(x1) & a_muddy(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1 x2.((x1 = x2) & n_boy(x2) & card_eq_2(x2))