People stand and watch from the grassy hill as an airplane soars close overhead.
People are swimming in a lake.
If they stand and watch, they are not swimming.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5.(n_hill(x3) & a_grassy(s1) & Theme(s1,x3) & Theme(e2,x5) & Actor(e2,x2) & v_soar(e2) & n_overhead(x5) & a_close(s2) & Theme(s2,x5) & from(x2,x3) & as(x3,x4) & n_airplane(x4) & n_watch(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2.(in(e1,x2) & n_lake(x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1))