Children wearing hats and making funny faces while smiling are standing next to a fence in the sand.
The kids have serious expressions on their faces.
The children cannot be making funny faces while having serious facial expressions
exists e1 e4 e3 e2 s1 x1 x2 x3 x4 x5 x6 x7.(n_sand(x7) & in(e4,x7) & to(e4,x6) & n_fence(x6) & r_next(e4) & Actor(e4,x1) & v_stand(e4) & while(e2,e3) & Actor(e3,x4) & v_smile(e3) & Theme(e2,x5) & Actor(e2,x4) & v_make(e2) & n_face(x5) & a_funny(s1) & Theme(s1,x5) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & (x1 = x2) & n_child(x1))
exists e1 s1 x1 x2 x3.(n_face(x3) & of(x3,x1) & n_thing(x1) & n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & on(x2,x3) & n_expression(x2) & a_serious(s1) & Theme(s1,x2))