Update README.md

Merge branch 'main' of https://huggingface.co/datasets/TomTBT/pmc_open_access_xml

Processing of the increments, without duplicate

Added download of increments

Bumped source version to 2022-03-04

Added links to the FTP folders in the README

Update README

Added preprocessing advices

Changed the example

Restored the full example

Dataset card YAML

formatting dataset card 3

formatting dataset card 2

formatting dataset card

formatting json example 3

formatting json example 2

formatting json example

Renaming loading script

original dataset script and card

initial commit