A pile of rocks and a group of people around it.
A pile of rocks is surrounded by a group of people.
If the people are around the pile of rocks then they are surrounding it.
exists x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & subset_of(x4,x2) & of(x4,x5) & around(x5,x1) & n_thing(x1) & n_people(x5) & n_group(x4) & subset_of(x3,x2) & n_rock(x3) & n_pile(x1))
exists e1 x1 x2 x3 x4.(Actor(e1,x3) & of(x3,x4) & n_people(x4) & n_group(x3) & Theme(e1,x1) & v_surround(e1) & of(x1,x2) & n_rock(x2) & n_pile(x1))