“…For example, in a meeting about the parking problem on campus, key words could include several nouns such as "bus," "campus," "car," and "bicycle" as well as several verbs and adjectives such as "abolish," "allowed," "commute," "difficult," and "easier." In addition, the size of the keyword list can be further reduced by "stemming" the content words [14], i.e., removing the prefix, suffix, or both so that only the root of the word remains.…”