Two boys playing in the sand.
A pair of kids are outside eating barbecue.
The kids can't be playing in the sand and eating barbecue at the same time.
exists e1 x1 x2 x3.(n_sand(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_boy(x1) & card_eq_2(x1))
exists p1 x1 x2.(exists s1 s2 x3.((x1 = x3) & n_barbecue(x3) & a_eating(s2) & Theme(s2,x3) & a_outside(s1) & Theme(s1,x3)) & of(x1,x2) & n_kid(x2) & n_pair(x1))