Two young boys swimming in a pool of green water.
Two young boys are swimming in green water.
A pool is another way to describe green water, and two young boys are swimming in both sentences.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_water(x4) & a_green(s2) & Theme(s2,x4) & n_pool(x3) & n_swimming(x1) & of(x1,x2) & n_boy(x2) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_water(x2) & a_green(s2) & Theme(s2,x2) & Actor(e1,x1) & v_swim(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))