If you&#x27;re interested in this idea where derivatives form one-hole contexts then you might also be interested in derivative parsers: <a href="http:&#x2F;&#x2F;matt.might.net&#x2F;papers&#x2F;might2011derivatives.pdf" rel="nofollow">http:&#x2F;&#x2F;matt.might.net&#x2F;papers&#x2F;might2011derivatives.pdf</a>