@inproceedings{secondPaper,
  title = {{{Placeholder Paper Title}}},
  booktitle = {2020 {{Placeholder Conference Title}}},
  author = {Surname, Name and Person, Sample},
  date = {2020-04},
  pages = {1234--1235},
  eventtitle = {2020 {{Placeholder Conference Title}}}
}

@inproceedings{firstPaper,
  title = {{{Placeholder Paper Title}}},
  booktitle = {2018 {{Placeholder Conference Title}}},
  author = {Person, Sample and Person, Sample and Surname, Name and Person, Sample},
  date = {2018-04},
  pages = {1234--1235},
  eventtitle = {2018 {{Placeholder Conference Title}}}
}