Three little boys take a bath in a rubber bin on the grass.
Three little boys are washing themselves with one bar of soap.
Just because all the boys are in the same bath does not mean that there is only one bar of soap.
exists e1 s1 x1 x2 x3 x4 x5.(n_grass(x5) & on(e1,x5) & in(e1,x3) & n_bin(x3) & of(x3,x4) & n_rubber(x4) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_bath(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 s1 x1 x2 x3 x4.(n_group(x2) & with(e1,x3) & of(x3,x4) & n_soap(x4) & n_bar(x3) & card_eq_1(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1) & card_eq_3(x1))