Two people, one with a white head covering, sit in the sand under a tree.
The people are swimming.
sitting in the sand is not swimming.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_sand(x5) & under(e1,x6) & n_tree(x6) & in(e1,x5) & Actor(e1,x1) & v_sit(e1) & rel(x1,x2) & with(x2,x3) & n_cover(x3) & of(x3,x4) & n_head(x4) & a_white(s1) & Theme(s1,x3) & n_thing(x2) & card_eq_1(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_swim(e1))