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Temporal information conveyed by language describes how the world around us changes through time. Events, durations and times are all temporal elements that can be viewed as intervals. These intervals are sometimes temporally related in text. Automatically determining the nature of such relations is a complex and unsolved problem. Some words can act as “signals” which suggest a temporal ordering between intervals. We use these signal words to improve the accuracy of a recent approach to classiﬁcation of temporal links.