Fig. 2

Annotation example in Excel file. The candidate corpus units were exported in Excel format so that annotators could easily annotate the corpus. The first and second columns represent annotated plant names and IDs contained in each sentence shown in the eleventh column. The sixth and seventh columns show annotated chemical names and IDs. Annotators should check whether plant and chemical names and their IDs are correctly annotated. If they are incorrectly annotated, then annotators should write the letter “X” in the fifth, tenth, or both columns. Also, they should leave comments in the fourth, ninth, or both columns. For the thirteenth column, annotators should determine whether the relationship in the sentence is positive or negative. If the sentence contains a positive relationship, the weak and strong triggers should be written in the last two columns