@article{schwartz2018exposure,
  title={Exposure to urban parks improves affect and reduces negativity on Twitter},
  author={Aaron Schwartz and Peter Sheridan Dodds and Jarlath O'Neil-Dunne and Chris Danforth and Taylor Ricketts},
  journal={Preprint},
  arXiv={1807.07982},
  year={2018},
  citations={}
}