An extractive text summarization for PubMed article abstracts. Based on Ng Wai Foong's post at https://medium.com/better-programming/extractive-text-summarization-using-spacy-in-python-88ab96d1fd97 with modifications: 1) Tracking case sensitive terms 2) Replacing "We" to "The authors" etc. 3) Give additional weights to these sentences with word "Conclusion" 4) Additional text cleaning