title: snowball : a prototype system for extracting relations from large text collections 2001. authors: e agichtein , l gravano , j pavel , v sokolova , a voskoboynik. venue: sigmod conference. year: nan
title: snowball : a prototype system for extracting relations from large text collections sigmod conference ,. authors: e agichtein , l gravano , j pavel , v sokolova , a. venue: nan. year: 2001.0