The turtle is being fed a strawberry
Turtle won't eat without strawberry.
The turtle is either being fed or it won't eat.
exists e1 x1 x2.(n_turtle(x1) & Recipient(e1,x2) & Theme(e1,x1) & v_feed(e1) & n_strawberry(x2))
exists x1.(ne_nam_turtle(x1) & -exists e1.(-exists x2.(with(e1,x2) & n_strawberry(x2)) & Actor(e1,x1) & v_eat(e1)))