A happy child play in the scoop of a shovel by a chair in a grassy backyard.
A sad child is swimming in the pool in the back yard.
the child cannot be happy and sad at the same time. he is also on the grass and not swimming in the pool
exists s1 s2 x1 x2 x3 x4 x5 x6.(n_scoop(x3) & a_topic(x1) & in(x1,x6) & n_backyard(x6) & a_grassy(s2) & Theme(s2,x6) & by(x1,x5) & n_chair(x5) & in(x1,x3) & of(x3,x4) & n_shovel(x4) & n_play(x1) & of(x1,x2) & n_child(x2) & a_happy(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(n_yard(x3) & a_back(s2) & Theme(s2,x3) & n_pool(x2) & in(e1,x3) & in(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_child(x1) & a_sad(s1) & Theme(s1,x1))