The boy does a flip over a grassy yard.
The boy is outside.
A grassy yard implies that the boy is outside.
exists e1 s1 x1 x2 x3.(n_boy(x1) & over(e1,x3) & n_yard(x3) & a_grassy(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_flip(x2))
exists s1 x1.(n_boy(x1) & Theme(s1,x1) & a_outside(s1))