$B(x)\rightarrow$ x is a bear
$F(x)\rightarrow$ x is a fish
$E(x,y)\rightarrow$ x eats y
Now, the Predicate logic $\forall x\left \{ F(x)\rightarrow \forall y\left \{ E(y,x)\rightarrow B(y) \right \} \right \}$
This says " For every x if x is a fish then if it is eaten by y then that y is only bear "
Which can be translated simply as
$\rightarrow$ Only Bears can eat fish .
OR
$\rightarrow$ Those who eat fish are bears.