Aspect-Based Sentiment Analysis in Product Reviews: Unsupervised Way

Nitesh Tripathi
Jan 4 · 6 min read

What is Aspect-Based Sentiment Analysis (ABSA)?

Unsupervised Rule-Based Approach for ABSA

POS Tags for Review B
nsubj(enjoyed-2, I-1)
ccomp(amazing-8, enjoyed-2)
det(screen-resolution-4, the-3)
dobj(enjoyed-2, screen-resolution-4)
nsubj(amazing-8, it-6)
cop(amazing-8, is-7)
root(ROOT-0, amazing-8)
case(laptop-13, for-9)
det:predet(laptop-13, such-10)
det(laptop-13, a-11)
amod(laptop-13, cheap-12)
nmod:for(amazing-8, laptop-13)

Rules for extracting Opinion-pairs

Opinion-pairs dependency graph

Welcome to a place where words matter. On Medium, smart voices and original ideas take center stage - with no ads in sight. Watch
Follow all the topics you care about, and we’ll deliver the best stories for you to your homepage and inbox. Explore
Get unlimited access to the best stories on Medium — and support writers while you’re at it. Just $5/month. Upgrade