Table 1 Overview of the time spent to perform mentions annotation (MA), concepts linking (CL), and relationship annotation (RA) on a set of 15 documents. The reported value of average (AVG), standard deviation (STD), median (MED), and 5th and 95th percentiles refer to the time spent annotating 15 documents 50 times

From: MetaTron: advancing biomedical annotation empowering relation annotation and collaboration