Popular approaches of opinion-based recommender system utilize various techniques including text mining , information retrieval , sentiment analysis ( see also Multimodal sentiment analysis ) and deep learning X.Y. Feng , H. Zhang , Y.J. Ren , P.H. Shang , Y. Zhu , Y.C. Liang , R.C. Guan , D. Xu , ( 2019 ) , , 21 ( 5 ) : e12957 .