Question of test split in covid-qa

[SeungoneKim]

Dear authors,

In the 7.3 section of the paper, there was a mention "Covid QA (CQA) Möller et al. (2020) created
COVID-QA, Question Answering dataset consisting of 2,019 question/answer pairs ...".

For training and evaluating, did you manually split into train/test sets?
In the google drive, there's only a train file for CQA, so could you please give detail of how you split it into train/test sets?
(https://drive.google.com/drive/folders/1JZPOZ2C_SFY_TxGCs99PYeD4S7uYTnmG)

Thanks in advance!