Research in automatic summarization has made headway over the years with single document summarization as the front-runner due to the availability of large datasets (Sandhaus, 2008; Hermann et al., 2015;<cite> Narayan et al., 2018b)</cite> which has enabled the development of novel methods, many of them employing recent advances in neural networks (See et al., 2017; Narayan et al., 2018c; , inter alia).