People and camels at a beach.
The camels can't get off the mountain.
cant be at a beach and on a mountain at the same time
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & at(x2,x3) & n_beach(x3) & n_camel(x2) & subset_of(x1,s1) & n_people(x1))
exists x1 x2.(n_mountain(x2) & n_camel(x1) & -exists e1 p1.(exists e2 s1.(a_off(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_get(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1)))