Three kids are observing a lake at a campus on a cloudy day.
Kids are by a lake.
if kids are observing a lake then kids must be by a lake
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_day(x4) & a_cloudy(s1) & Theme(s1,x4) & at(e1,x3) & n_campus(x3) & Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_lake(x2) & n_kid(x1) & card_eq_3(x1))
exists p1 x1.(exists x2.(by(x1,x2) & n_lake(x2)) & n_kid(x1))