Identifying different viewpoints is related to the well-studied area of subjectivity detection, which aims at exposing opinion, evaluation, and speculation in text (Wiebe et al., 2004) and attributing it to specific people (Awadallah et al., 2011;Abu-Jbara et al., 2012).
while some of the perspective words are neutral, mostly literal and occur in both English and Spanish (e.g.