is an example of a complex keyword, since the words forming the phrase can only express speculation together.
to the minimalist strategy followed when annotating the keywords, the annotation of scopes of the keywords was performed by assigning the scope to the largest syntactic unit possible by including all the elements between the keyword and the target word to the scope (in order to avoid scopes without a keyword) and by including the modifiers of the target word to the scope (Vincze et al., 2008).