other,0-1-P83-1004,ak The extension is shown to be parseable by a simple extension to an existing <term> parsing method </term> for <term> GPSG </term> . <term> Metagrammatical formalisms </term> that combine <term> context-free phrase structure rules and metarules ( MPS grammars ) </term> allow concise statement of <term> generalizations </term> about the <term> syntax </term> of <term> natural languages </term> .
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