Because sentence boundaries are considered to also be the EDU boundaries, we measure segmentation accuracy with respect to the intra-sentential segment boundaries, which is a standard method (Soricut and Marcu 2003;Fisher and Roark 2007).
if a sentence contains n EDUs, which corresponds to n − 1 intra-sentential segment boundaries, we measure the segmenter's ability to correctly identify these n − 1 boundaries.