A child in a green cap sits at a boats controls.
the birds were short necked
The subject cannot be both a child and birds.
exists e1 s1 x1 x2 x3 x4.(at(e1,x3) & n_control(x3) & of(x3,x4) & n_boat(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_cap(x2) & a_green(s1) & Theme(s1,x2) & n_child(x1))
exists e1 s1 x1.(n_bird(x1) & for(s1,e1) & Theme(e1,x1) & v_neck(e1) & Theme(s1,x1) & a_short(s1))