Before revision:  In relation extraction , dependency trees that contain rich syntactic clues have been widely used to help capture long-term dependencies in text . Graph neural networks (GNNs), one of the means to encode dependency graphs, has been shown effective in several prior works.
After revision:  In relation extraction , dependency trees that contain rich syntactic clues have been widely used to help capture long-term dependencies in text . Graph neural networks (GNNs), one of the means to encode dependency graphs, have been shown to be effective in prior works.