A dark-skinned woman swims in clear water.
A woman is swimming in dirty lake water.
The water the woman is swimming in is either clear or dirty.
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_water(x3) & a_clear(s2) & Theme(s2,x3) & n_swim(x1) & of(x1,x2) & n_woman(x2) & a_dark-skinned(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(in(e1,x2) & n_water(x2) & of(x2,x4) & n_lake(x4) & of(x2,x3) & n_dirty(x3) & Actor(e1,x1) & v_swim(e1) & n_woman(x1))