Amplification for task B of Dryrun

For dryrun task B, <NEG></NEG> tag which is using for negative expression is added as a optional tag.

<NEG></NEG> tag is optionally used in the <NARRATIVE></NARRATIVE> tag.

Data format is modified as follows for dryrun.

before;
narrative      	:= <NARRATIVE>EUC-string</NARRATIVE>
{narrative of query}

currently;
narrative := <NARRATIVE>EUC-string[<NEG>EUC-string</NEG>]*</NARRATIVE>
{narrative of query, NEG tags express negative expressions}

• In NARRATIVE tag, the string enclosed with NEG tag shows a negative expression.
• NEG tag is an optional tag. So in some cases, there might not be NEG tag.