Volunteers working at a surfing booth at beach.
people at the beach
Volunteers are working at the beach.
exists e1 x1 x2 x3 x4.(at(e1,x4) & n_beach(x4) & at(e1,x2) & n_booth(x2) & of(x2,x3) & n_surfing(x3) & Actor(e1,x1) & v_work(e1) & n_volunteer(x1))
exists x1 x2.(n_beach(x2) & a_topic(x1) & at(x1,x2) & n_people(x1))