Pier with groups of people, some with fishing poles, boats in water and buildings and monuments in background.
The pier is empty.
If there are groups of people on the pier, it isn't empty.
exists s1 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12.(ne_per_pier(s1) & a_topic(s1) & with(s1,x1) & rel(x1,x3) & subset_of(x11,x3) & in(x11,x12) & n_background(x12) & n_monument(x11) & subset_of(x4,x3) & with(x4,x5) & rel(x5,x7) & subset_of(x10,x7) & n_building(x10) & subset_of(x8,x7) & in(x8,x9) & n_water(x9) & n_boat(x8) & n_pole(x5) & of(x5,x6) & n_fishing(x6) & n_thing(x4) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 x1.(n_pier(x1) & Theme(s1,x1) & a_empty(s1))