A girl does a somersault in the middle of a grassy field.
The girl is sleeping under a tree.
A girl cannot be doing a somersault and sleeping at the same time. Not all grassy fields have trees.
exists e1 s1 x1 x2 x3 x4.(n_middle(x3) & in(e1,x3) & of(x3,x4) & n_field(x4) & a_grassy(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_somersault(x2) & n_girl(x1))
exists e1 x1 x2.(n_girl(x1) & under(e1,x2) & n_tree(x2) & Actor(e1,x1) & v_sleep(e1))