Many kinds of news report provide information about events. For example, business news reports in the area of mergers and acquisitions, provide information about events such as "company X making a bid for company Y", or "takeover of company Y by company X being rejected by the anti-trust authorities". Futhermore, news reports do not normally exist in isolation. There is an underlying narrative which concerns a number of entities related in some way over a period of time. In many domains, stories will follow a stereotypical sequence. For example, a particular takeover may involve a bid being made, a rejection by the target board, a rise in the bid value by the potential buyer, a recommendation of acceptance by the target board, acceptance by the shareholders, and finally successful completion of the takeover. In order to merge heterogeneous news reports that describe events, we need to identify and reason about the events being described prior to merging them. In th...