Determining POS of the words having the same surface form may be more ambiguous because a verb or an adjective can appear in the position of a noun as in the case of báo cáo in rows 3 and 4 of  (as the case of báo cáo in rows 5 6 of Table 2).
in this section, we will discuss our method to improve the quality of annotation guidelines and to ensure correct and consistent annotation.