\item<2-> Relations often involve coreference links\\
\small{
\myemph{\annot{Bill Gates}{PER}}\textbf{\underline{is co-founder, technology advisor and board member}} of \annot{Microsoft}{ORG}. \myemph{\annot{He}{PER}}\textbf{\underline{served as chairman of the board}} until Feb. 4, 2014. On June 27, 2008, \myemph{\annot{Gates}{PER}}\textbf{\underline{transitioned out}} of a day-to-day role in the company to spend more time on his global health and education work at the \annot{Bill \& Melinda Gates Foundation}{ORG}.
\item The information required may be spread across multiple sentences
\item The information may be implied by the text rather than explicitly asserted \ra\ \myemphb{inference}
\end{enumerate}
\textbf{Ex1.:}
\myemph{\annot{Dirk Ruthless}{PER}} of \annot{MegaCorp}{ORG} made a stunning announcement today. In September \myemph{\annot{he}{PER}} will be stepping down as \annot{Chief Executive Officer}{POS} to spend more time with his pet piranhas.
\begin{itemize}
\item[\Ra] resolve \textbf{pronominal anaphor}\myemph{Dirk Ruthless}\Lra\ \myemph{he} to determine the corporate \textsc{position}
\item[\Ra] In Ex1.: no explicit statement that \myemph{Dirk Ruthless}\textbf{is} CEO of MegaCorp
\begin{itemize}
\item "\myemph{\annot{Dirk Ruthless}{PER}} of \annot{MegaCorp}{ORG}" + "will be stepping down as \annot{Chief Executive Officer}{POS}" = \myemph{\annot{Dirk Ruthless}{PER}} is CEO of \annot{MegaCorp}{ORG}
\end{itemize}
\item Solving RE may imply solving \myemphb{textual entailment}
Ex.: \annot{American Airlines}{ORG}, a unit of \annot{AMR Inc.}{ORG}, immediately matched the move, spokesman \annot{Tim Wagner}{PER} said. \source{Jurafsky and Martin, 2nd ed., p. 730}