Firstly, we weigh edges according to connecting words' syntactic parts-of-speech via edge multiplier m. We distinguish content words (e.g., nouns, verbs, adjectives and adverbs) from are not and implement three different levels of content-word score aggregation.
we have slightly content word centered score propagation when m>1 in Step (4a) and m=1 in Step (4b) to (4d), while we have moderate content word aggregation when m>1 in Step (4a) and (4d) and m=1 in Step (4b) and (4c).