[R] Train/test split of TF detection API • r/MachineLearning

I would like to use the Tensorflow's pretrained models on coco, but I can't find the image split they used for training and testing. According to their "Speed/accuracy trade-offs" paper - "Our networks are trained on the COCO dataset, using all training images as well as a subset of validation images, holding out 8000 examples for validation". Does anyone know which data they used for testing?