A woman and man, both dressed in black, sit by the water.
The woman and man are outside.
Some water features are inside, there are indoor fountains, pools, bath, therefore this doesn't have to be outside.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_water(x7) & by(e2,x7) & Actor(e2,x1) & v_sit(e2) & rel(x1,x4) & Theme(e1,s1) & Theme(s1,x6) & a_black(s1) & Theme(e1,x5) & v_dress(e1) & (x4 = x5) & n_thing(x4) & n_man(x3) & n_woman(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists s1 x1 x2 x3.(n_man(x3) & n_woman(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Theme(s1,x1) & a_outside(s1))