QTSM prec denotes QTSM based on the classifier optimizing performance prec@k. This table indicates that the complex QA performance can be clearly improved by exploiting social Q&A collection.
we observe that: 1) QTSM obtains the best performance; e.g., the F 3 improvements of QTSM prec over MTM and QSM qa in terms of N =10 are 5.8% and 6.0%, respectively.