This document presents a new approach for co-extracting opinion targets from online reviews using a supervised word alignment model. The proposed approach uses a fully-supervised word alignment model that treats different opinion relations as an alignment problem. A graph-based re-ranking algorithm is then used to estimate the confidence of each candidate target/word. Candidates with higher confidence are extracted as opinion targets or opinion words. Experimental results on 3 corpora in different languages show that the proposed approach outperforms previous methods.