Moreover, to create a valuable corpus, it is important to annotate the promotion/suppression relations involving the article title (a variable T, hereafter), because the article is naturally intended to provide knowledge about T. Therefore, we force T to participate in an argument of a promotion/suppression relation.
the annotation task is accomplished by labeling PRO ("T promotes Y"), SUP ("T suppresses Y"), PRO BY ("X promotes T"), or SUP BY ("X suppresses T") for text spans (denoted by Y for PRO and SUP, and denoted by X for PRO BY and SUP BY) in the article.