Table 1 illustrates the window-based model's training examples corresponding to one sentence "wake me up at 8 AM ." which is broken down into 6 pairs. <n> and </n> indicate the center of the window. A window center might contain 1 or more words (e.g., "8 AM") and the grouping is provided by the dataset where each input sentence is segmented into chunks corresponding to labels such as TIME, DATE, ORDINAL<cite> (Sproat and Jaitly, 2016)</cite> .