The task of linking events and relations to time stamps can be defined as the following: given a set of expressions denoting events or relation men-tions in a document, and a set of time expressions in the same document, find all instances of the t link relation between elements of the two input sets.
the existence of a t link (e, t) means that e, which is an event or a relation mention, occurs within the temporal context specified by the time expression t. our task can be cast as a binary relation classification task: for each possible pair of (event/relation, time) in a document, decide whether there exists a link between the two, and if so, express it in the data.