Children sitting in a canoe on a quiet lake.
Children play tag in the grass by a lake.
Children cannot play tag while sitting.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_lake(x4) & a_quiet(s1) & Theme(s1,x4) & in(e1,x3) & n_canoe(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_child(x1))
exists e1 x1 x2 x3 x4.(n_grass(x3) & by(e1,x4) & n_lake(x4) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tag(x2) & n_child(x1))