People are gathered at an event in a sandy area.
People swimming in the ocean.
People cannot be gathered at an event and swimming simultaneously. A sandy area is normally found near the ocean, not in the ocean.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_area(x3) & a_sandy(s1) & Theme(s1,x3) & at(e1,x2) & n_event(x2) & Theme(e1,x1) & v_gather(e1) & n_people(x1))
exists x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & n_swimming(x1) & of(x1,x2) & n_people(x2))