Question: For a context free grammar $G$ and two sentential forms $w_{1}$ and $w_{2}$ we define the relation $Rightarrow $ as follows: $w_{1} ightarrow

For a context free grammar $G$ and two sentential forms $w_{1}$

For a context free grammar $G$ and two sentential forms $w_{1}$ and $w_{2}$ we define the relation $\Rightarrow $ as follows: $w_{1} ightarrow

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