In this paper, we consider some results obtained for graphs using minimal vertex separators and generalized chordality translate them to the context of Geometric group theory. Using these new tools, are able give two characterizations a be virtually free. Furthermore, prove that Baumslag–Solitar [Formula: see text] is text]-chordal if only an application study word problem.

Chemical Named Entity Recognition (NER) is the basic step for consequent information extraction tasks such as named entity resolution, drug-drug interaction discovery, extraction of the names of the molecules and their properties. Improvement in the performance of such systems may affects the quality of the subsequent tasks. Chemical text from which data for named entity recognition is extracte...